Document:

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                                                                    EXHIBIT 10.3

                            SERIES D PREFERRED STOCK

                               PURCHASE AGREEMENT

                           REQUISITE TECHNOLOGY, INC.

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                                TABLE OF CONTENTS

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<S>      <C>   <C>                                                                                              <C>
SECTION 1.  AGREEMENT TO SELL AND PURCHASE........................................................................1

         1.1  Authorization of Shares.............................................................................1

         1.2  Sale and Purchase...................................................................................1

SECTION 2.  CLOSING, DELIVERY AND PAYMENT.........................................................................1

         2.1  Initial Closing.....................................................................................1

         2.2  Subsequent Sales of Shares..........................................................................2

         2.3  Delivery............................................................................................2

SECTION 3.  REPRESENTATIONS AND WARRANTIES OF THE COMPANY.........................................................2

         3.1  Organization, Good Standing and Qualification.......................................................2

         3.2  Capitalization; Voting Rights.......................................................................3

         3.3  Authorization; Binding Obligations..................................................................3

         3.4  Financial Statements................................................................................4

         3.5  Liabilities.........................................................................................4

         3.6  Agreements; Action..................................................................................4

         3.7  Obligations to Related Parties......................................................................5

         3.8  Changes.............................................................................................6

         3.9  Title to Properties and Assets; Liens, etc..........................................................7

         3.10  Patents and Trademarks.............................................................................7

         3.11  Compliance with Other Instruments..................................................................8

         3.12  Litigation.........................................................................................8

         3.13  Tax Returns and Payments...........................................................................9

         3.14  Employees..........................................................................................9

         3.15  Non-Competition and Non-Disclosure Agreements......................................................9

         3.16  Obligations of Management..........................................................................9

         3.17  Registration Rights................................................................................9

         3.18  Compliance with Laws; Permits.....................................................................10

         3.19  Environmental and Safety Laws.....................................................................10

         3.20  Offering Valid....................................................................................10

         3.21  Full Disclosure...................................................................................10
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                                       i.

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                                TABLE OF CONTENTS
                                   (CONTINUED)

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<S>      <C>   <C>                                                                                               <C>

         3.22  Qualified Small Business..........................................................................11

         3.23  Minute Books......................................................................................11

         3.24  Section 83(b) Elections...........................................................................11

         3.25  Real Property Holding Corporation.................................................................11

         3.26  Insurance.........................................................................................11

         3.27  Investment Company Act............................................................................11

         3.28  ERISA.............................................................................................11

SECTION 4.  REPRESENTATIONS AND WARRANTIES OF THE PURCHASERS.....................................................11

         4.1  Requisite Power and Authority......................................................................11

         4.2  Investment Representations.........................................................................12

         4.3  Transfer Restrictions..............................................................................13

SECTION 5.  CONDITIONS TO INITIAL CLOSING........................................................................13

         5.1  Conditions to Purchasers' Obligations at the Initial Closing.......................................13

         5.2  Conditions to Obligations of the Company...........................................................15

SECTION 6.  MISCELLANEOUS........................................................................................15

         6.1  Governing Law......................................................................................15

         6.2  Survival...........................................................................................15

         6.3  Successors and Assigns.............................................................................16

         6.4  Entire Agreement...................................................................................16

         6.5  Severability.......................................................................................16

         6.6  Amendment and Waiver...............................................................................16

         6.7  Delays or Omissions................................................................................16

         6.8  Notices............................................................................................17

         6.9  Expenses...........................................................................................17

         6.10  Attorneys' Fees...................................................................................17

         6.11  Titles and Subtitles..............................................................................17

         6.12  Counterparts......................................................................................17

         6.13  Broker's Fees.....................................................................................17

         6.14  Exculpation Among Purchasers......................................................................17

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                                      ii.

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         <S>   <C>                                                                                               <C>
         6.15  Pronouns..........................................................................................17
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                                      iii.
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                                INDEX OF EXHIBITS

Schedule of Purchasers                                                 Exhibit A

Restated Certificate                                                   Exhibit B

Second Amended and Restated Investor Rights Agreement                  Exhibit C

Investment Agreement                                                   Exhibit D

List of Stockholders and Optionholders                                 Exhibit E

Financial Statements                                                   Exhibit F

Form of Non-Competition and Non-Disclosure Agreement                   Exhibit G

Form of Legal Opinion                                                  Exhibit H

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                            SERIES D PREFERRED STOCK

                               PURCHASE AGREEMENT

         THIS SERIES D PREFERRED STOCK PURCHASE AGREEMENT (the "Agreement") is
entered into as of this 1st day of July, 1998, by and among REQUISITE
TECHNOLOGY, INC., a Delaware corporation (the "Company") and each of those
persons and entities, severally and not jointly, whose names are set forth on
the Schedule of Purchasers attached hereto as Exhibit A (which persons and
entities are hereinafter collectively referred to as "Purchasers" and each
individually as a "Purchaser").

                                    RECITALS

         WHEREAS, the Company has authorized the sale and issuance of an
aggregate of 2,170,000 shares of its Series D Preferred Stock (the "Shares");

         WHEREAS, Purchasers desire to purchase up to all of the Shares on the
terms and conditions set forth herein; and

         WHEREAS, the Company desires to issue and sell the Shares to Purchasers
on the terms and conditions set forth herein;

         NOW, THEREFORE, in consideration of the foregoing recitals and the
mutual promises hereinafter set forth, the parties hereto agree as follows:

SECTION 1. AGREEMENT TO SELL AND PURCHASE.

         1.1 AUTHORIZATION OF SHARES. On or prior to the Initial Closing (as
defined in Section 2 below), the Company shall have authorized (i) the sale and
issuance to Purchasers of the Shares, and (ii) the issuance of such shares of
Common Stock to be issued upon conversion of the Shares (the "Conversion
Shares"). The Shares and the Conversion Shares shall have the rights,
preferences, privileges and restrictions set forth in the Restated Certificate
of Incorporation of the Company in the form attached hereto as Exhibit B (the
"Restated Certificate").

         1.2 SALE AND PURCHASE. Subject to the terms and conditions hereof, at
each Closing the Company hereby agrees to issue and sell to each Purchaser,
severally and not jointly, and each Purchaser agrees to purchase from the
Company, severally and not jointly, the number of Shares set forth opposite such
Purchaser's name on Exhibit A, at a purchase price of Three Dollars and
Twenty-Seven Cents ($3.27) per share.

SECTION 2. CLOSING, DELIVERY AND PAYMENT.

         2.1 INITIAL CLOSING. The initial closing of the sale and purchase of
the Shares under this Agreement (the "Initial Closing") shall take place at
10:00 a.m. on July 1, 1998, at the offices of Cooley Godward LLP, 2595 Canyon
Blvd., Suite 250, Boulder, Colorado 80302, or at

                                       1.
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such other time or place as the Company and Purchasers may mutually agree (such
date is hereinafter referred to as the "Initial Closing Date").

         2.2 SUBSEQUENT SALES OF SHARES. At any time on or before the 30th day
following the Initial Closing Date, the Company may sell, in one or more
closings (each a "Subsequent Closing") up to the balance of the Shares not sold
at the Initial Closing to such persons (the "Additional Purchasers") as may be
acceptable to the Company. At each Subsequent Closing, (i) each Additional
Purchaser shall execute a counterpart signature page hereto whereupon such
Additional Purchaser shall become a "Purchaser" hereunder and the Shares
purchased by such Additional Purchaser shall be deemed to be "Shares" hereunder,
(ii) each Additional Purchaser shall execute a counterpart signature page to the
Second Amended and Restated Investor Rights Agreement, dated of even date
herewith (the "Investor Rights Agreement"), whereupon such Additional Purchaser
shall become an "Investor" and "Holder" thereunder, the shares of Series D
Preferred Stock held by such Additional Purchaser shall be deemed to be "Series
D Stock" and "Shares" thereunder, and (iii) the Company shall cause Exhibit A to
this Agreement and to the Investor Rights Agreement to be amended to reflect the
purchase made by the Additional Purchasers at each Subsequent Closing.
Notwithstanding any provision herein to the contrary, the Company is authorized
to effectuate each such Subsequent Closing on the terms described herein without
further action or approval on the part of the Purchasers. All such sales shall
be made on the terms and conditions of this Agreement, provided that closing
conditions set forth in Section 5.1 shall not apply to any Subsequent Closing.
The Initial Closing and each Subsequent Closing are referred to as a "Closing"
and the Initial Closing Date and each Subsequent Closing Date are referred to as
a "Closing Date."

         2.3 DELIVERY. At each Closing, subject to the terms and conditions
hereof, the Company will deliver to the Purchasers certificates representing the
number of Shares to be purchased at such Closing by each Purchaser, against
payment of the purchase price therefor by check or wire transfer of immediately
available funds made payable to the order of the Company.

SECTION 3. REPRESENTATIONS AND WARRANTIES OF THE COMPANY.

         Except as set forth on the Schedule of Exceptions delivered to the
Purchasers in connection with the purchase of Shares hereunder, the Company
hereby represents and warrants to each Purchaser as follows:

         3.1 ORGANIZATION, GOOD STANDING AND QUALIFICATION. The Company is a
corporation duly organized, validly existing and in good standing under the laws
of the State of Delaware. The Company has all requisite corporate power and
authority to own and operate its properties and assets, to execute and deliver
this Agreement, the Second Amended and Restated Investor Rights Agreement in the
form attached hereto as Exhibit C (the "Investor Rights Agreement") and the
Investment Agreement attached hereto as Exhibit D (the "Investment Agreement")
(collectively, the "Related Agreements"), to issue and sell the Shares and the
Conversion Shares and to carry out the provisions of this Agreement, the Related
Agreements and the Restated Certificate and to carry on its business as
presently conducted and as presently proposed to be conducted. The Company is
duly qualified and is authorized to do business and

                                       2.
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is in good standing as a foreign corporation in Colorado and all other
jurisdictions in which the nature of its activities and of its properties (both
owned and leased) makes such qualification necessary, except for those
jurisdictions in which failure to do so would not have a material adverse effect
on the Company or its business. The Company owns no equity securities of any
other corporation, limited partnership or similar entity. The Company is not a
participant in any joint venture, partnership or similar arrangement.

         3.2 CAPITALIZATION; VOTING RIGHTS. The authorized capital stock of the
Company, immediately prior to the Closing, will consist of (x) 16,850,000 shares
of Common Stock, 2,037,754 shares of which are issued and outstanding and
2,130,000 shares of which have been reserved for issuance to key employees and
consultants pursuant to the Company's 1995 Stock Option Plan, of which 90,062
remain available for issuance under such plan, and (y) 8,719,955 shares of
Preferred Stock, 337,420 of which are designated Series A Preferred Stock,
189,630 shares of which are issued and outstanding, 3,132,535 of which are
designated Series B Preferred Stock, 3,118,785 shares of which are issued and
outstanding, 3,050,000 of which are designated Series C Preferred Stock,
2,946,088 shares of which are issued and outstanding and 2,200,000 of which are
designated Series D Preferred Stock, none of which are issued and outstanding.
All issued and outstanding shares of the Company's Common Stock and Preferred
Stock (i) have been duly authorized and validly issued to the persons listed on
Exhibit E hereto, (ii) are fully paid and nonassessable, and (iii) were issued
in compliance with all applicable state and federal laws concerning the issuance
of securities. The rights, preferences, privileges and restrictions of the
Shares are as stated in the Restated Certificate and are valid, binding and
enforceable in accordance with applicable law. The Conversion Shares have been
duly and validly reserved for issuance. Other than as set forth on Exhibit E,
and except as may be granted pursuant to the Related Agreements, there are no
outstanding options, warrants, rights (including conversion or preemptive rights
and rights of first refusal), proxy or shareholder agreements, or agreements of
any kind for the purchase or acquisition from the Company of any of its
securities. There are no rights of first refusal with respect to the issuance of
the Shares and the subsequent conversion of the Shares into Conversion Shares
that have not been complied with or for which waivers have not been obtained.
When issued in compliance with the provisions of this Agreement and the Restated
Certificate, the Shares and the Conversion Shares will be validly issued, fully
paid and nonassessable with no personal liability attaching to the ownership
thereof, and will be free of any liens or encumbrances; provided, however, that
the Shares and the Conversion Shares may be subject to restrictions on transfer
under state and/or federal securities laws as set forth herein or as otherwise
required by such laws at the time a transfer is proposed. The Company has no
obligation to purchase, acquire or redeem any of its outstanding securities.
After giving effect to the transactions contemplated hereby, all officers,
directors and holders of one percent (1%) of the outstanding capital stock of
the Company are subject to a market stand-off agreement in substantially the
form contained in Section 2.13 of the Investor Rights Agreement.

         3.3 AUTHORIZATION; BINDING OBLIGATIONS. All corporate action on the
part of the Company, its officers, directors and stockholders necessary for the
authorization of this Agreement and the Related Agreements, the performance of
all obligations of the Company hereunder and thereunder at the Closing and the
authorization, sale, issuance and delivery of the Shares pursuant hereto and the
Conversion Shares pursuant to the Restated Certificate has been

                                       3.
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taken or will be taken prior to the Closing. The Agreement and the Related
Agreements, when executed and delivered, will be legal, valid and binding
obligations of the Company enforceable in accordance with their terms, except
(i) as limited by applicable bankruptcy, insolvency, reorganization, moratorium
or other laws of general application affecting enforcement of creditors' rights;
(ii) general principles of equity that restrict the availability of equitable
remedies; and (iii) to the extent that the enforceability of the indemnification
provisions in Section 2.9 of the Investor Rights Agreement may be limited by
applicable laws.

         3.4 FINANCIAL STATEMENTS. The Company has delivered to each Purchaser
(i) its audited balance sheet as at December 31, 1997 and audited statement of
income and cash flows for the twelve months ending December 31, 1997 and (ii)
its unaudited balance sheet as at May 31, 1998 (the "Statement Date") and
unaudited consolidated statement of income and cash flows for the five month
period ending on the Statement Date (collectively, the "Financial Statements"),
copies of which are attached hereto as Exhibit F. The Financial Statements,
together with the notes thereto, are complete and correct in all material
respects, have been prepared in accordance with generally accepted accounting
principles applied on a consistent basis throughout the periods indicated,
except as disclosed therein, and present fairly the financial condition and
position of the Company as of December 31, 1997 and the Statement Date;
provided, however, that the financial statements as of the Statement Date are
subject to normal recurring year-end audit adjustments (which are not expected
to be material), and do not contain all footnotes required under generally
accepted accounting principles.

         3.5 LIABILITIES. The Company has no material liabilities and, to the
best of its knowledge, knows of no material contingent liabilities not disclosed
in the Financial Statements, except current liabilities incurred in the ordinary
course of business subsequent to the Statement Date which have not been, either
in any individual case or in the aggregate, materially adverse.

         3.6 AGREEMENTS; ACTION.

             (a) Except for agreements explicitly contemplated hereby and
agreements between the Company and its employees with respect to the sale of the
Company's Common Stock, there are no agreements, understandings or proposed
transactions between the Company and any of its officers, directors, affiliates
or any affiliate thereof.

             (b) There are no agreements, understandings, instruments,
contracts, proposed transactions, judgments, orders, writs or decrees to which
the Company is a party or by which it is bound which may involve (i) obligations
(contingent or otherwise) of, or payments to, the Company in excess of $50,000
or (ii) the license of any patent, copyright, trade secret or other proprietary
right to or from the Company (other than licenses arising from the purchase of
"off the shelf" or other standard products), or (iii) provisions restricting or
affecting the development, manufacture or distribution of the Company's products
or services, or (iv) indemnification by the Company with respect to
infringements of proprietary rights (other than indemnification obligations
arising from purchase or sale agreements entered into in the ordinary course of
business).

                                       4.
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             (c) The Company has not (i) declared or paid any dividends, or
authorized or made any distribution upon or with respect to any class or series
of its capital stock, (ii) incurred any indebtedness which is currently
outstanding for money borrowed or any other liabilities (other than with respect
to indebtedness and other obligations incurred in the ordinary course of
business or as disclosed in the Financial Statements) individually in excess of
$50,000 or, in the case of indebtedness and/or liabilities individually less
than $50,000, in excess of $100,000 in the aggregate, (iii) made any loans or
advances to any person, other than ordinary advances for travel expenses, or
(iv) sold, exchanged or otherwise disposed of any of its assets or rights, other
than the sale of its inventory in the ordinary course of business.

             (d) For the purposes of subsections (b) and (c) above, all
indebtedness, liabilities, agreements, understandings, instruments, contracts
and proposed transactions involving the same person or entity (including persons
or entities the Company has reason to believe are affiliated therewith) shall be
aggregated for the purpose of meeting the individual minimum dollar amounts of
such subsections.

             (e) The Company has performed all material obligations
required to be performed by it as of the date hereof under any material
agreement to which the Company is a party or by which it is bound. There are no
agreements not otherwise disclosed that could reasonably be expected to
materially and adversely affect the Company. No party to any such material
contract has notified the Company with a claim to the effect that the Company
has failed to perform an obligation thereunder. To the knowledge of the Company,
there is no plan, intention or indication of any contracting party to such
material contract to cause the termination, cancellation or modification of such
material contract or to reduce or otherwise change its activity thereunder so as
to materially and adversely effect the benefits derived as expected to be
derived therefrom by the Company.

             (f) The Company has not engaged in the past three (3) months
in any discussion (i) with any representative of any corporation or corporations
regarding the consolidation or merger of the Company with or into any such
corporation or corporations, (ii) with any corporation, partnership, association
or other business entity or any individual regarding the sale, conveyance or
disposition of all or substantially all of the assets of the Company, or a
transaction or series of related transactions in which more than fifty percent
(50%) of the voting power of the Company is disposed of, or (iii) regarding any
other form of acquisition, liquidation, dissolution or winding up of the
Company.

         3.7 OBLIGATIONS TO RELATED PARTIES. There are no obligations of the
Company to officers, directors or employees of the Company other than (a) for
payment of salary for services rendered, (b) reimbursement for reasonable
expenses incurred on behalf of the Company, (c) for other standard employee
benefits made generally available to all employees (including stock option
agreements outstanding under any stock option plan approved by the Board of
Directors of the Company). None of the officers or directors who are employees
of the Company, or any members of their immediate families, are indebted to the
Company or have any direct or indirect ownership interest in any firm or
corporation with which the Company is affiliated or with which the Company has a
business relationship, or any firm or corporation which competes with the

                                       5.
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Company, except that officers, directors and/or stockholders of the Company may
own stock in publicly traded companies which may compete with the Company. No
officer or director who is an employee of the Company, or any member of their
immediate families, is, directly or indirectly, interested in any material
contract with the Company (other than such contracts as relate to any such
person's ownership of capital stock or other securities of the Company). Except
as may be disclosed in the Financial Statements, the Company is not a guarantor
or indemnitor of any indebtedness of any other person, firm or corporation.

         3.8 CHANGES. Since the Statement Date, there has not been to the
Company's knowledge:

             (a) Any change in the assets, liabilities, financial condition or
operations of the Company from that reflected in the Financial Statements, other
than changes in the ordinary course of business, none of which individually or
in the aggregate has had or is expected to have a material adverse effect on
such assets, liabilities, financial condition or operations of the Company;

             (b) Any resignation or termination of any key officers of the
Company; and the Company, to the best of its knowledge, does not know of the
impending resignation or termination of employment of any such officer;

             (c) Any material change, except in the ordinary course of business,
in the contingent obligations of the Company by way of guaranty, endorsement,
indemnity, warranty or otherwise;

             (d) Any damage, destruction or loss, whether or not covered by
insurance, materially and adversely affecting the properties, business or
prospects or financial condition of the Company;

             (e) Any waiver by the Company of a valuable right or of a material
debt owed to it;

             (f) Any direct or indirect loans made by the Company to any
stockholder, employee, officer or director of the Company, other than advances
made in the ordinary course of business;

             (g) Any material change in any compensation arrangement or
agreement with any employee, officer, director or stockholder;

             (h) Any declaration or payment of any dividend or other
distribution of the assets of the Company or any repurchase or redemption of any
outstanding security of the Company;

             (i) Any labor organization activity;

                                       6.
<PAGE>   12

             (j) Any debt, obligation or liability incurred, assumed or
guaranteed by the Company, except those for immaterial amounts and for current
liabilities incurred in the ordinary course of business;

             (k) Any sale, assignment or transfer of any patents, trademarks,
copyrights, trade secrets or other intangible assets;

             (l) Any issuance of any capital stock (or rights or options to
acquire capital stock of the Company), other than options granted pursuant to
the Company's 1995 Stock Option Plan;

             (m) Any change in any material agreement to which the Company
is a party or by which it is bound which materially and adversely affects the
business, assets, liabilities, financial condition, operations or prospects of
the Company, including compensation agreements with the Company's employees; or

             (n) Any other event or condition of any character that, either
individually or cumulatively, has materially and adversely affected the
business, assets, liabilities, financial condition, operations or prospects of
the Company.

         3.9 TITLE TO PROPERTIES AND ASSETS; LIENS, ETC. The Company has good
and marketable title to its properties and assets, including the properties and
assets reflected in the most recent balance sheet included in the Financial
Statements, and good title to its leasehold estates, in each case subject to no
mortgage, pledge, lien, lease, encumbrance or charge, other than (i) those
resulting from taxes which have not yet become delinquent and (ii) minor liens
and encumbrances which do not materially detract from the value of the property
subject thereto or materially impair the operations of the Company. All
facilities, machinery, equipment, fixtures, vehicles and other properties owned,
leased or used by the Company are in good operating condition and repair and are
reasonably fit and usable for the purposes for which they are being used.

         3.10 PATENTS AND TRADEMARKS. The Company owns or possesses sufficient
legal rights to all patents, and, to the best of its knowledge after reasonable
investigation, all trademarks, service marks, trade names, copyrights, trade
secrets, information and other proprietary rights and processes necessary for
its business as now conducted and as proposed to be conducted, without any known
infringement of the rights of others. Set forth on the Schedule of Exceptions is
a list of the Company's patents, pending patent applications, registered
trademarks and pending trademark applications. There are no outstanding options,
licenses or agreements of any kind relating to the foregoing, nor is the Company
bound by or a party to any options, licenses or agreements of any kind with
respect to the patents, trademarks, service marks, trade names, copyrights,
trade secrets, licenses, information and other proprietary rights and processes
of any other person or entity other than such licenses or agreements arising
from the purchase of "off the shelf" or standard products. The Company has not
received any communications alleging that the Company has violated or, by
conducting its business as proposed, would violate any of the patents,
trademarks, service marks, trade names, copyrights or trade secrets or other
proprietary rights of any other person or entity, nor to the Company's

                                       7.
<PAGE>   13

knowledge, is there a basis for any such claim. The Company is not aware that
any of its employees is obligated under any contract (including licenses,
covenants or commitments of any nature) or other agreement, or subject to any
judgment, decree or order of any court or administrative agency, that would
interfere with their duties to the Company or that would conflict with the
Company's business as proposed to be conducted. Neither the execution nor
delivery of this Agreement, nor the carrying on of the Company's business by the
employees of the Company, nor the conduct of the Company's business as proposed,
will, to the Company's knowledge, conflict with or result in a breach of the
terms, conditions or provisions of, or constitute a default under, any contract,
covenant or instrument under which any employee is now obligated. The Company
does not believe it is or will be necessary to utilize any inventions, trade
secrets or proprietary information of any of its employees made prior to their
employment by the Company, except for inventions, trade secrets or proprietary
information that have been assigned to the Company.

         3.11 COMPLIANCE WITH OTHER INSTRUMENTS. The Company is not in violation
or default of any term of its Restated Certificate or Bylaws, or of any
provision of any mortgage, indenture, agreement, instrument or contract to which
it is party or by which it is bound or of any judgment, decree, order, writ or,
to its knowledge, any statute, rule or regulation applicable to the Company
which would materially and adversely affect the business, assets, liabilities,
financial condition, operations or prospects of the Company. The execution,
delivery, and performance of and compliance with this Agreement, and the Related
Agreements, and the issuance and sale of the Shares pursuant hereto and of the
Conversion Shares pursuant to the Restated Articles, will not, with or without
the passage of time or giving of notice, result in any such material violation,
or be in conflict with or constitute a default under any such term, or result in
the creation of any mortgage, pledge, lien, encumbrance or charge upon any of
the properties or assets of the Company or the suspension, revocation,
impairment, forfeiture or nonrenewal of any permit license, authorization or
approval applicable to the Company, its business or operations or any of its
assets or properties.

         3.12 LITIGATION. There is no action, suit, proceeding or investigation
pending or to the Company's knowledge currently threatened against the Company
that questions the validity of this Agreement, or the Related Agreements or the
right of the Company to enter into any of such agreements, or to consummate the
transactions contemplated hereby or thereby, or which might result, either
individually or in the aggregate, in any material adverse change in the assets,
condition, affairs or prospects of the Company, financially or otherwise, or any
change in the current equity ownership of the Company, nor is the Company aware
that there is any basis for the foregoing. The foregoing includes, without
limitation, actions pending or threatened (or any basis therefor known to the
Company) involving the prior employment of any of the Company's employees, their
use in connection with the Company's business of any information or techniques
allegedly proprietary to any of their former employers, or their obligations
under any agreements with prior employers. The Company is not a party or subject
to the provisions of any order, writ, injunction, judgment or decree of any
court or government agency or instrumentality. There is no action, suit,
proceeding or investigation by the Company currently pending or which the
Company intends to initiate.

                                       8.
<PAGE>   14

         3.13 TAX RETURNS AND PAYMENTS. The Company has timely filed all tax
returns (federal, state and local) required to be filed by it. All taxes shown
to be due and payable on such returns, any assessments imposed, and to the
Company's knowledge all other taxes due and payable by the Company on or before
the Closing have been paid or will be paid prior to the time they become
delinquent. The Company has not been advised (i) that any of its returns,
federal, state or other, have been or are being audited as of the date hereof,
or (ii) of any deficiency in assessment or proposed judgment to its federal,
state or other taxes. The Company has no knowledge of any liability of any tax
to be imposed upon its properties or assets as of the date of this Agreement
that is not adequately provided for.

         3.14 EMPLOYEES. The Company has no collective bargaining agreements
with any of its employees. There is no labor union organizing activity pending
or, to the Company's knowledge, threatened with respect to the Company. No
employee has any agreement or contract, written or verbal, regarding his
employment. The Company is not a party to or bound by any currently effective
employment contract, deferred compensation arrangement, bonus plan, incentive
plan, profit sharing plan, retirement agreement or other employee compensation
plan or agreement. To the Company's knowledge, no employee of the Company, nor
any consultant with whom the Company has contracted, is in violation of any term
of any employment contract, proprietary information agreement or any other
agreement relating to the right of any such individual to be employed by, or to
contract with, the Company because of the nature of the business to be conducted
by the Company; and to the Company's knowledge the continued employment by the
Company of its present employees, and the performance of the Company's contracts
with its independent contractors, will not result in any such violation. The
Company has not received any notice alleging that any such violation has
occurred. No employee of the Company has been granted the right to continued
employment by the Company or to any material compensation following termination
of employment with the Company. The Company is not aware that any officer or key
employee, or that any group of key employees, intends to terminate their
employment with the Company.

         3.15 NON-COMPETITION AND NON-DISCLOSURE AGREEMENTS. Each former and
current employee, officer and consultant of the Company has executed an
agreement regarding non-competition and/or non-disclosure of the Company's
confidential information in one of the forms attached as Exhibit G hereto, or an
agreement containing substantially the same restrictions as those set forth in
such forms.

         3.16 OBLIGATIONS OF MANAGEMENT. Each officer and key employee of the
Company is currently devoting one hundred percent (100%) of his or her business
time to the conduct of the business of the Company. The Company is not aware of
any officer or key employee of the Company planning to work less than full time
at the Company in the future.

         3.17 REGISTRATION RIGHTS. Except as required pursuant to the Investor
Rights Agreement, the Company is presently not under any obligation, and has not
granted any rights, to register (as defined in Section 1.1 of the Investor
Rights Agreement) any of the Company's presently outstanding securities or any
of its securities that may hereafter be issued.

                                       9.
<PAGE>   15

         3.18 COMPLIANCE WITH LAWS; PERMITS. To its knowledge, the Company is
not in violation of any applicable statute, rule, regulation, order or
restriction of any domestic or foreign government or any instrumentality or
agency thereof in respect of the conduct of its business or the ownership of its
properties which violation would materially and adversely affect the business,
assets, liabilities, financial condition, operations or prospects of the
Company. No governmental orders, permissions, consents, approvals or
authorizations are required to be obtained and no registrations or declarations
are required to be filed in connection with the execution and delivery of this
Agreement and the issuance of the Shares or the Conversion Shares, except such
as has been duly and validly obtained or filed, or with respect to any filings
that must be made after the Closing, as will be filed in a timely manner. The
Company has all franchises, permits, licenses and any similar authority
necessary for the conduct of its business as now being conducted by it, the lack
of which could materially and adversely affect the business, properties,
prospects or financial condition of the Company and believes it can obtain,
without undue burden or expense, any similar authority for the conduct of its
business as planned to be conducted.

         3.19 ENVIRONMENTAL AND SAFETY LAWS. To its knowledge, the Company is
not in violation of any applicable statute, law or regulation relating to the
environment or occupational health and safety, and to its knowledge, no material
expenditures are or will be required in order to comply with any such existing
statute, law or regulation.

         3.20 OFFERING VALID. Assuming the accuracy of the representations and
warranties of the Purchasers contained in Section 4.2 hereof, the offer, sale
and issuance of the Shares and the Conversion Shares will be exempt from the
registration requirements of the Securities Act of 1933, as amended (the
"Securities Act") and will have been registered or qualified (or are exempt from
registration and qualification) under the registration, permit or qualification
requirements of all applicable state securities laws. Neither the Company nor
any agent on its behalf has solicited or will solicit any offers to sell or has
offered to sell or will offer to sell all or any part of the Shares to any
person or persons so as to bring the sale of such Shares by the Company within
the registration provisions of the Securities Act.

         3.21 FULL DISCLOSURE. This Agreement, the Exhibits hereto, the Related
Agreements and any certificate delivered by the Company to the Purchasers or
their attorneys or agents in connection herewith or therewith or with the
transactions contemplated hereby or thereby do not contain any untrue statement
of a material fact nor, to the Company's knowledge after reasonable
investigation, omit to state a material fact necessary in order to make the
statements contained herein or therein not misleading. To the Company's
knowledge after reasonable investigation, there are no facts which (individually
or in the aggregate) materially adversely affect the business, assets,
liabilities, financial condition, prospects or operations of the Company that
have not been set forth in the Agreement, the Exhibits hereto, the Related
Agreements or in other documents delivered to the Purchasers or their attorneys
or agents in connection therewith.

         3.22 QUALIFIED SMALL BUSINESS. The Company represents and warrants to
the Purchasers that, to the best of its knowledge, the Shares should qualify as
"Qualified Small Business Stock" as defined in Section 1202(c) of the Internal
Revenue Code of 1986, as amended

                                      10.
<PAGE>   16

(the "Code") as of the date hereof. The Company will use reasonable efforts to
comply with the reporting and record keeping requirements of Section 1202 of the
Code, any regulations promulgated thereunder and any similar state laws and
regulations, and agrees not to repurchase any stock of the Company if such
repurchase would cause such Shares not to so qualify as "Qualified Small
Business Stock" unless the Board of Directors otherwise determines that such
repurchase would be in the best interests of the Company.

         3.23 MINUTE BOOKS. The minute books of the Company provided to the
Purchasers contain a complete summary of all meetings of directors and
stockholders since July 18, 1996.

         3.24 SECTION 83(b) ELECTIONS. To the Company's knowledge, all elections
and notices permitted by Section 83(b) of the Internal Revenue Code and any
analogous provisions of applicable state tax laws have been timely filed by all
employees who have purchased shares of the Company's common stock under
agreements that provide for the vesting of such shares.

         3.25 REAL PROPERTY HOLDING CORPORATION. The Company is not a real
property holding corporation within the meaning of Internal Revenue Code Section
897(c)(2) and any regulations promulgated thereunder.

         3.26 INSURANCE. The Company maintains fire and casualty insurance
policies and other insurance coverage customary for companies similarly situated
to the Company.

         3.27 INVESTMENT COMPANY ACT. The Company is not an "investment
company", or a company "controlled" by an "investment", within the meaning of
the Investment Company Act of 1940, as amended.

         3.28 ERISA. The Company has complied in all material respects with the
applicable rules and regulations of the Employee Retirement Income Security Act
of 1974, as amended, with respect to any employee benefit plans subject thereto.

SECTION 4. REPRESENTATIONS AND WARRANTIES OF THE PURCHASERS.

         Each Purchaser hereby represents and warrants to the Company as of the
Closing as follows (such representations and warranties do not lessen or obviate
the representations and warranties of the Company set forth in this Agreement):

         4.1 REQUISITE POWER AND AUTHORITY. Purchaser has all necessary power
and authority under all applicable provisions of law to execute and deliver this
Agreement and the Related Agreements and to carry out their provisions. All
action on Purchaser's part required for the lawful execution and delivery of
this Agreement and the Related Agreements have been or will be effectively taken
prior to the Closing. Upon their execution and delivery, this Agreement and the
Related Agreements will be valid and binding obligations of Purchaser,
enforceable in accordance with their terms, except (i) as limited by applicable
bankruptcy, insolvency, reorganization, moratorium or other laws of general
application affecting enforcement of creditors' rights, (ii) general principles
of equity that restrict the availability of equitable

                                      11.
<PAGE>   17

remedies, and (iii) to the extent that the enforceability of the indemnification
provisions of Section 2.9 of the Investor Rights Agreement may be limited by
applicable laws.

         4.2 INVESTMENT REPRESENTATIONS. Purchaser understands that the Shares
and the Conversion Shares have not been registered under the Securities Act.
Purchaser also understands that the Shares are being offered and sold pursuant
to an exemption from registration contained in the Securities Act based in part
upon Purchaser's representations contained in the Agreement. Purchaser hereby
represents and warrants as follows:

             (a) PURCHASER BEARS ECONOMIC RISK. Purchaser has substantial
experience in evaluating and investing in private placement transactions of
securities in companies similar to the Company so that it is capable of
evaluating the merits and risks of its investment in the Company and has the
capacity to protect its own interests. Purchaser must bear the economic risk of
this investment indefinitely unless the Shares (or the Conversion Shares) are
registered pursuant to the Securities Act, or an exemption from registration is
available. Purchaser understands that the Company has no present intention of
registering the Shares, the Conversion Shares or any shares of its Common Stock.
Purchaser also understands that there is no assurance that any exemption from
registration under the Securities Act will be available and that, even if
available, such exemption may not allow Purchaser to transfer all or any portion
of the Shares or the Conversion Shares under the circumstances, in the amounts
or at the times Purchaser might propose.

             (b) ACQUISITION FOR OWN ACCOUNT. Purchaser is acquiring the Shares
and the Conversion Shares for Purchaser's own account for investment only, and
not with a view towards their distribution.

             (c) PURCHASER CAN PROTECT ITS INTEREST. Purchaser represents
that by reason of its, or of its management's, business or financial experience,
Purchaser has the capacity to protect its own interests in connection with the
transactions contemplated in this Agreement, and the Related Agreements.
Further, Purchaser is aware of no publication of any advertisement in connection
with the transactions contemplated in the Agreement.

             (d) ACCREDITED INVESTOR. Purchaser represents that it is an
accredited investor within the meaning of Regulation D under the Securities Act.

             (e) COMPANY INFORMATION. Purchaser has received and read the
Financial Statements and has had an opportunity to discuss the Company's
business, management and financial affairs with directors, officers and
management of the Company and has had the opportunity to review the Company's
operations and facilities. Purchaser has also had the opportunity to ask
questions of and receive answers from, the Company and its management regarding
the terms and conditions of this investment.

             (f) RULE 144. Purchaser acknowledges and agrees that the
Shares, and, if issued, the Conversion Shares must be held indefinitely unless
they are subsequently registered under the Securities Act or an exemption from
such registration is available. Purchaser has been advised or is aware of the
provisions of Rule 144 promulgated under the Securities Act, which

                                      12.
<PAGE>   18

permits limited resale of shares purchased in a private placement subject to the
satisfaction of certain conditions, including, among other things: the
availability of certain current public information about the Company, the resale
occurring not less than one year after a party has purchased and paid for the
security to be sold, the sale being through an unsolicited "broker's
transaction" or in transactions directly with a market maker (as said term is
defined under the Securities Exchange Act of 1934, as amended) and the number of
shares being sold during any three-month period not exceeding specified
limitations.

             (g) RESIDENCE. If the Purchaser is an individual, then the
Purchaser resides in the state or province identified in the address of the
Purchaser set forth on Exhibit A; if the Purchaser is a partnership,
corporation, limited liability company or other entity, then the office or
offices of the Purchaser in which its investment decision was made is located at
the address or addresses of the Purchaser set forth on Exhibit A.

         4.3 TRANSFER RESTRICTIONS. Each Purchaser acknowledges and agrees that
the Shares and, if issued, the Conversion Shares are subject to restrictions on
transfer as set forth in the Investor Rights Agreement.

SECTION 5. CONDITIONS TO INITIAL CLOSING.

         5.1 CONDITIONS TO PURCHASERS' OBLIGATIONS AT THE INITIAL CLOSING. Each
Purchaser's obligations to purchase the Shares at the Initial Closing are
subject to the satisfaction, at or prior to the Closing, of the following
conditions:

             (a) REPRESENTATIONS AND WARRANTIES TRUE; PERFORMANCE OF
OBLIGATIONS. The representations and warranties made by the Company in Section 3
hereof shall be true and correct in all material respects as of the Initial
Closing Date with the same force and effect as if they had been made as of the
Initial Closing Date, and the Company shall have performed all obligations and
conditions herein required to be performed or observed by it on or prior to the
Initial Closing.

             (b) LEGAL INVESTMENT. On the Closing Date, the sale and issuance of
the Shares, and the proposed issuance of the Conversion Shares, shall be legally
permitted by all laws and regulations to which Purchasers and the Company are
subject.

             (c) CONSENTS, PERMITS, AND WAIVERS. The Company shall have obtained
any and all consents, permits and waivers necessary or appropriate for
consummation of the transactions contemplated by the Agreement and the Related
Agreements (except for such as may be properly obtained subsequent to the
Closing).

             (d) FILING OF RESTATED CERTIFICATE. The Restated Certificate shall
have been filed with the Secretary of State of the State of Delaware.

             (e) CORPORATE DOCUMENTS. The Company shall have delivered to
Purchasers or their counsel, copies of all corporate documents of the Company as
Purchasers shall reasonably request, including without limitation, its
Certificate of Incorporation and Bylaws.

                                      13.
<PAGE>   19

             (f) RESERVATION OF CONVERSION SHARES. The Conversion Shares
issuable upon conversion of the Shares shall have been duly authorized and
reserved for issuance upon such conversion.

             (g) COMPLIANCE CERTIFICATE. The Company shall have delivered
to Purchasers a Compliance Certificate, executed by the President of the
Company, dated the date of the Initial Closing, to the effect that the
conditions specified in subsections (a), (c), (d) and (f) of this Section 5.1
have been satisfied.

             (h) INVESTOR RIGHTS AGREEMENT. An Investor Rights Agreement
substantially in the form attached hereto as Exhibit C shall have been executed
and delivered by the parties thereto.

             (i) INVESTMENT AGREEMENT. An Investment Agreement substantially in
the form attached hereto as Exhibit D shall have been executed and delivered by
the parties thereto.

             (j) LEGAL OPINION. The Purchasers shall have received from legal
counsel to the Company an opinion addressed to them, dated as of the Initial
Closing Date, in substantially the form attached hereto as Exhibit H.

             (k) SBA MATTERS. The Company shall have executed and delivered
to each Purchaser that is a licensed Small Business Investment Company a Size
Status Declaration on SBA Form 480, an Assurance of Compliance on SBA Form 652
and an SBA Certification in the form provided to the Company, and shall have
provided to each such Purchaser information necessary for the preparation of a
Portfolio Financing Report on SBA Form 1031.

             (l) GRAINGER AGREEMENTS. The Company and W.W. Grainger, Inc. shall
have entered into a Professional Services Agreement, Software License Agreement,
and Cooperation and Noncompetition Agreement in a form acceptable to the Company
and W.W. Grainger, Inc.

             (l) MINIMUM INVESTMENT. The Purchasers shall purchase a minimum of
2,140,000 Shares at the Initial Closing.

             (m) PROCEEDINGS AND DOCUMENTS. All corporate and other
proceedings in connection with the transactions contemplated at the Initial
Closing hereby and all documents and instruments incident to such transactions
shall be reasonably satisfactory in substance and form to the Purchasers and
their special counsel, and the Purchasers and their special counsel shall have
received all such counterpart originals or certified or other copies of such
documents as they may reasonably request.

         5.2 CONDITIONS TO OBLIGATIONS OF THE COMPANY. The Company's obligation
to issue and sell the Shares at each Closing is subject to the satisfaction, on
or prior to such Closing, of the following conditions:

                                      14.
<PAGE>   20

             (a) REPRESENTATIONS AND WARRANTIES TRUE. The representations
and warranties made by Purchasers in Section 4 hereof shall be true and correct
in all material respects at the date of the Closing, with the same force and
effect as if they had been made on and as of said date.

             (b) PERFORMANCE OF OBLIGATIONS. Purchasers shall have performed and
complied with all agreements and conditions herein required to be performed or
complied with by Purchasers on or before the Closing.

             (c) FILING OF RESTATED CERTIFICATE. The Restated Certificate shall
have been filed with the Secretary of State of the State of Delaware.

             (d) INVESTOR RIGHTS AGREEMENT. An Investor Rights Agreement
substantially in the form attached hereto as Exhibit C shall have been executed
and delivered by the Purchasers.

             (e) INVESTMENT AGREEMENT. An Investment Agreement substantially in
the form attached hereto as Exhibit D shall have been executed and delivered by
the parties thereto.

             (f) GRAINGER AGREEMENTS. The Company and W.W. Grainger, Inc. shall
have entered into a Professional Services Agreement, Software License Agreement,
and Cooperation and Noncompetition Agreement in a form acceptable to the Company
and W.W. Grainger, Inc.

             (g) CONSENTS, PERMITS, AND WAIVERS. The Company shall have
obtained any and all consents, permits and waivers necessary or appropriate for
consummation of the transactions contemplated by the Agreement and the Related
Agreements (except for such as may be properly obtained subsequent to the
Closing).

SECTION 6. MISCELLANEOUS.

         6.1 GOVERNING LAW. This Agreement shall be governed in all respects by
the laws of the State of Delaware as such laws are applied to agreements between
Delaware residents entered into and performed entirely in Delaware.

         6.2 SURVIVAL. The representations, warranties, covenants and agreements
made herein shall survive any investigation made by any Purchaser and the
closing of the transactions contemplated hereby. All statements as to factual
matters contained in any certificate or other instrument delivered by or on
behalf of the Company pursuant hereto in connection with the transactions
contemplated hereby shall be deemed to be representations and warranties by the
Company hereunder solely as of the date of such certificate or instrument.

         6.3 SUCCESSORS AND ASSIGNS. Except as otherwise expressly provided
herein, the provisions hereof shall inure to the benefit of, and be binding
upon, the successors, assigns, heirs, executors and administrators of the
parties hereto and shall inure to the benefit of and be enforceable by each
person who shall be a holder of the Shares from time to time.

                                      15.
<PAGE>   21

         6.4 ENTIRE AGREEMENT. This Agreement, the Exhibits and Schedules
hereto, the Related Agreements and the other documents delivered pursuant hereto
constitute the full and entire understanding and agreement between the parties
with regard to the subjects hereof and no party shall be liable or bound to any
other in any manner by any representations, warranties, covenants and agreements
except as specifically set forth herein and therein.

         6.5 SEVERABILITY. In case any provision of the Agreement shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

         6.6 AMENDMENT AND WAIVER.

             (a) This Agreement may be amended or modified only upon the
written consent of the Company and holders of at least a majority of the Shares
(treated as if converted and including any Conversion Shares into which the
Shares have been converted that have not been sold to the public).

             (b) The obligations of the Company and the rights of the
holders of the Shares and the Conversion Shares under the Agreement may be
waived only with the written consent of the holders of at least a majority of
the Shares (treated as if converted and including any Conversion Shares into
which the Shares have been converted that have not been sold to the public).

             (c) Notwithstanding the foregoing, this Agreement may be
amended with only the written consent of the Company to include Additional
Purchasers as "Purchasers" hereunder and parties hereto as provided for in
Section 2.2 hereof.

         6.7 DELAYS OR OMISSIONS. It is agreed that no delay or omission to
exercise any right, power or remedy accruing to any party, upon any breach,
default or noncompliance by another party under this Agreement, the Related
Agreements or the Restated Certificate, shall impair any such right, power or
remedy, nor shall it be construed to be a waiver of any such breach, default or
noncompliance, or any acquiescence therein, or of or in any similar breach,
default or noncompliance thereafter occurring. It is further agreed that any
waiver, permit, consent or approval of any kind or character on any Purchaser's
part of any breach, default or noncompliance under this Agreement, the Related
Agreements or under the Restated Certificate or any waiver on such party's part
of any provisions or conditions of the Agreement, the Related Agreements, or the
Restated Certificate must be in writing and shall be effective only to the
extent specifically set forth in such writing. All remedies, either under this
Agreement, the Related Agreements, the Restated Certificate, by law, or
otherwise afforded to any party, shall be cumulative and not alternative.

         6.8 NOTICES. All notices required or permitted hereunder shall be in
writing and shall be deemed effectively given: (i) upon personal delivery to the
party to be notified; (ii) when sent by confirmed telex or facsimile if sent
during normal business hours of the recipient, if not, then on the next business
day; (iii) five (5) days after having been sent by registered or certified mail,
return receipt requested, postage prepaid; or (iv) one (1) day after deposit
with a nationally

                                      16.
<PAGE>   22

recognized overnight courier, specifying next day delivery, with written
verification of receipt. All communications shall be sent to the Company at the
address as set forth on the signature page hereof and to Purchaser at the
address set forth on Exhibit A attached hereto or at such other address as the
Company or Purchaser may designate by ten (10) days advance written notice to
the other parties hereto.

         6.9 EXPENSES. Each party shall pay all costs and expenses that it
incurs with respect to the negotiation, execution, delivery and performance of
the Agreement.

         6.10 ATTORNEYS' FEES. In the event that any dispute among the parties
to this Agreement should result in litigation, the prevailing party in such
dispute shall be entitled to recover from the losing party all fees, costs and
expenses of enforcing any right of such prevailing party under or with respect
to this Agreement, including without limitation, such reasonable fees and
expenses of attorneys and accountants, which shall include, without limitation,
all fees, costs and expenses of appeals.

         6.11 TITLES AND SUBTITLES. The titles of the sections and subsections
of the Agreement are for convenience of reference only and are not to be
considered in construing this Agreement.

         6.12 COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which shall be an original, but all of which together
shall constitute one instrument.

         6.13 BROKER'S FEES. Each party hereto represents and warrants that no
agent, broker, investment banker, person or firm acting on behalf of or under
the authority of such party hereto is or will be entitled to any broker's or
finder's fee or any other commission directly or indirectly in connection with
the transactions contemplated herein. Each party hereto further agrees to
indemnify each other party for any claims, losses or expenses incurred by such
other party as a result of the representation in this Section 6.13 being untrue.

         6.14 EXCULPATION AMONG PURCHASERS. Each Purchaser acknowledges that it
is not relying upon any person, firm, or corporation, other than the Company and
its officers and directors, in making its investment or decision to invest in
the Company. Each Purchaser agrees that no Purchaser nor the respective
controlling persons, officers, directors, partners, agents, or employees of any
Purchaser shall be liable for any action heretofore or hereafter taken or
omitted to be taken by any of them in connection with the Shares and Conversion
Shares.

         6.15 PRONOUNS. All pronouns contained herein, and any variations
thereof, shall be deemed to refer to the masculine, feminine or neutral,
singular or plural, as to the identity of the parties hereto may require.

                      [THIS SPACE INTENTIONALLY LEFT BLANK]

                                      17.
<PAGE>   23

         IN WITNESS WHEREOF, the parties hereto have executed the SERIES D
PREFERRED STOCK PURCHASE AGREEMENT as of the date set forth in the first
paragraph hereof.

COMPANY:                                    PURCHASERS:

REQUISITE TECHNOLOGY, INC.                  MOHR, DAVIDOW VENTURES IV, L.P.
                                            BY: FOURTH MDV PARTNERS, L.L.C.,
                                                GENERAL PARTNER

By: /s/ BARBARA MOWRY                       By: /s/
    --------------------------------------      --------------------------------
     Barbara Mowry                                 Member
     President and Chief Executive Officer

Address:  4888 Pearl East Circle            MDV IV ENTREPRENEURS' NETWORK FUND,
          Suite 300                         L.P.
          Boulder, CO  80301
                                            BY: FOURTH MDV PARTNERS, L.L.C.,
                                                GENERAL PARTNER

                                            By: /s/
                                                --------------------------------
                                                   Member

                                            SEQUEL LIMITED PARTNERSHIP
                                            BY: SEQUEL VENTURE PARTNERS, L.L.C.,
                                                GENERAL PARTNER

                                            By: /s/ THOMAS G. WASHING
                                                --------------------------------
                                                   Manager

                                            SEQUEL EURO LIMITED PARTNERSHIP
                                            BY: SEQUEL VENTURE PARTNERS, L.L.C.,
                                                GENERAL PARTNER

                                            By: /s/ THOMAS G. WASHING
                                                --------------------------------
                                                   Manager

                  Series D Preferred Stock Purchase Agreement

<PAGE>   24

                                            PHILADELPHIA VENTURES LIBERTY FUND,
                                            L.P.
                                            BY: LIBERTY VENTURES, INC.
                                                MANAGING GENERAL PARTNER

                                            By: /s/ KAREN GRIFFITH GRYGA
                                                --------------------------------
                                                   Vice President

                                            TRINITY VENTURES V, L.P.,
                                            A CALIFORNIA LIMITED PARTNERSHIP

                                            BY: TRINITY TVL PARTNERS V, L.P.,
                                                A CALIFORNIA LIMITED PARTNERSHIP
                                                ITS GENERAL PARTNER

                                            By: /s/ LARRY ORR
                                                --------------------------------
                                                   General Partner

                                            TRINITY V SIDE-BY-SIDE FUND, L.P.,
                                            A CALIFORNIA LIMITED PARTNERSHIP

                                            BY: TRINITY TVL PARTNERS V, L.P.,
                                                A CALIFORNIA LIMITED PARTNERSHIP
                                                ITS GENERAL PARTNER

                                            By: /s/ LARRY ORR
                                                --------------------------------
                                                   General Partner

                                            W.W. GRAINGER, INC.

                                            By: /s/ JOHN A. SCHWEIG
                                                --------------------------------
                                            Name: John A. Schweig
                                                  ------------------------------
                                            Title: Senior Vice President,
                                                    Business Development &
                                                    International
                                                   -----------------------------

                                            CORPORATE EXPRESS, INC.

                                            By: /s/ RICHARD L. MILLETT, JR.
                                                --------------------------------
                                            Name: Richard L. Millett, Jr.
                                                  ------------------------------
                                            Title: Vice President
                                                   -----------------------------

<PAGE>   25

                                    EXHIBIT A

                             SCHEDULE OF PURCHASERS

<TABLE>
<CAPTION>

                                             SERIES D                AGGREGATE
    NAME AND ADDRESS                          STOCK               PURCHASE PRICE
    ----------------                         --------             --------------
<S>                                          <C>                  <C>
Mohr, Davidow Ventures IV, L.P.               227,806                $744,925.62
3000 Sand Hill Road
Building 1, Suite 240
Menlo Park, CA  94025
Attn:  Nancy J. Schoendorf

MDV IV Entrepreneurs' Network Fund, L.P.       11,990                $ 39,207.30
3000 Sand Hill Road
Building 1, Suite 240
Menlo Park, CA  94025
Attn:  Nancy J. Schoendorf

Sequel Limited Partnership                    111,479                $364,536.33
4430 Arapahoe Avenue, Suite 220
Boulder, CO  80303
Attn:  Thomas G. Washing

Sequel Euro Limited Partnership                48,760                $159,445.20
4430 Arapahoe Avenue, Suite 220
Boulder, CO  80303
Attn:  Thomas G. Washing

Trinity Ventures V, L.P.                      102,532                $335,279.64
3000 Sand Hill Road
Bldg. 1, Suite 240
Menlo Park, CA 94025
Attn:  Noel Fenton

Trinity V Side-by-Side Fund, L.P.               4,993                $ 16,327.11
3000 Sand Hill Road
Bldg. 1, Suite 240
Menlo Park, CA 94025
Attn:  Noel Fenton
</TABLE>

<PAGE>   26

<TABLE>
<CAPTION>

                                             SERIES D                AGGREGATE
    NAME AND ADDRESS                          STOCK               PURCHASE PRICE
    ----------------                         --------             --------------
<S>                                          <C>                  <C>

Philadelphia Ventures Liberty Fund, L.P.       43,010             $   140,642.70
200 South Broad Street
8th Floor
Philadelphia, PA  19102
Attn:  Karen Griffith-Gryga

Corporate Express, Inc.                        61,051             $   199,636.77
1 Environmental Way
Broomfield, CO  80021
Attn:  Rick Millett, General Counsel

W.W. Grainger, Inc.                         1,529,052             $ 5,000,000.04
455 Knightsbridge Parkway
Lincolnshire,  IL  60069-3620
Attn:  Don Bielinski, Group President

TOTAL                                       ---------             --------------
                                            2,140,673             $ 7,000,000.71
</TABLE><PAGE>   1
                                                                  EXHIBIT 10.4

                            SERIES E PREFERRED STOCK

                               PURCHASE AGREEMENT

                           REQUISITE TECHNOLOGY, INC.

<PAGE>   2
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                                 PAGE

<S>               <C>                                                                                            <C>
SECTION 1.        AGREEMENT TO SELL AND PURCHASE..................................................................1

         1.1      Authorization of Shares.........................................................................1

         1.2      Sale and Purchase...............................................................................1

SECTION 2.        CLOSING, DELIVERY AND PAYMENT...................................................................1

         2.1      Closing.........................................................................................1

         2.2      Delivery........................................................................................2

SECTION 3.        REPRESENTATIONS AND WARRANTIES OF THE COMPANY...................................................2

         3.1      Organization, Good Standing and Qualification...................................................2

         3.2      Capitalization; Voting Rights...................................................................2

         3.3      Rights and Terms of Preferred Stock.............................................................3

         3.4      Authorization; Binding Obligations..............................................................3

         3.5      Financial Statements............................................................................3

         3.6      Liabilities.....................................................................................4

         3.7      Agreements; Action..............................................................................4

         3.8      Obligations to Related Parties..................................................................5

         3.9      Changes.........................................................................................5

         3.10     Title to Properties and Assets; Liens, etc......................................................7

         3.11     Patents and Trademarks..........................................................................7

         3.12     Compliance with Other Instruments...............................................................7

         3.13     Litigation......................................................................................8

         3.14     Tax Returns and Payments........................................................................8

         3.15     Employees.......................................................................................8

         3.16     Non-Competition and Non-Disclosure Agreements...................................................9

         3.17     Obligations of Management.......................................................................9

         3.18     Registration Rights.............................................................................9

         3.19     Compliance with Laws; Permits...................................................................9

         3.20     Environmental and Safety Laws..................................................................10

         3.21     Offering Valid.................................................................................10

         3.22     Full Disclosure................................................................................10

         3.23     Qualified Small Business.......................................................................10
</TABLE>

                                       i.

<PAGE>   3
                               TABLE OF CONTENTS
                                  (CONTINUED)
<TABLE>
<CAPTION>

                                                                                                                PAGE
<S>               <C>                                                                                            <C>
         3.24     Minute Books...................................................................................11

         3.25     Section 83(b) Elections........................................................................11

         3.26     Real Property Holding Corporation..............................................................11

         3.27     Insurance......................................................................................11

         3.28     Investment Company Act.........................................................................11

         3.29     ERISA..........................................................................................11

         3.30     Year 2000......................................................................................11

         3.31     Use of Proceeds................................................................................11

         3.32     Significant Customers and Suppliers............................................................11

SECTION 4.        REPRESENTATIONS AND WARRANTIES OF THE PURCHASERS...............................................12

         4.1      Requisite Power and Authority..................................................................12

         4.2      Investment Representations.....................................................................12

         4.3      Transfer Restrictions..........................................................................13

SECTION 5.        CONDITIONS TO CLOSING..........................................................................13

         5.1      Conditions to Purchasers' Obligations at the Closing...........................................13

         5.2      Conditions to Obligations of the Company.......................................................15

SECTION 6.        MISCELLANEOUS..................................................................................16

         6.1      Governing Law..................................................................................16

         6.2      Survival.......................................................................................16

         6.3      Successors and Assigns.........................................................................16

         6.4      Entire Agreement...............................................................................16

         6.5      Severability...................................................................................16

         6.6      Amendment and Waiver...........................................................................16

         6.7      Delays or Omissions............................................................................16

         6.8      Notices........................................................................................17

         6.9      Expenses.......................................................................................17

         6.10     Attorneys' Fees................................................................................17

         6.11     Titles and Subtitles...........................................................................17

         6.12     Counterparts...................................................................................17

         6.13     Broker's Fees..................................................................................17
</TABLE>

                                       ii.
<PAGE>   4
                               TABLE OF CONTENTS
                                  (CONTINUED)
<TABLE>
<CAPTION>

                                                                                                                PAGE
<S>               <C>                                                                                            <C>
         6.14     Exculpation Among Purchasers...................................................................17

         6.15     Pronouns.......................................................................................18
</TABLE>

                                      iii.
<PAGE>   5

                                INDEX OF EXHIBITS

<TABLE>
<S>                                                                 <C>
Schedule of Purchasers                                              Exhibit A

Restated Certificate                                                Exhibit B

Third Amended and Restated Investor Rights Agreement                Exhibit C

Shareholders Agreement                                              Exhibit D

List of Stockholders and Optionholders                              Exhibit E

Financial Statements                                                Exhibit F

Form of Non-Competition and Non-Disclosure Agreement                Exhibit G

Form of Legal Opinion                                               Exhibit H
</TABLE>

                                      iv.

<PAGE>   6

                            SERIES E PREFERRED STOCK

                               PURCHASE AGREEMENT

         THIS SERIES E PREFERRED STOCK PURCHASE AGREEMENT (the "AGREEMENT") is
entered into as of this 13th day of September, 1999, by and among REQUISITE
TECHNOLOGY, INC., a Delaware corporation (the "COMPANY") and each of those
persons and entities, severally and not jointly, whose names are set forth on
the Schedule of Purchasers attached hereto as Exhibit A (which persons and
entities are hereinafter collectively referred to as "PURCHASERS" and each
individually as a "PURCHASER").

                                    RECITALS

         WHEREAS, the Company has authorized the sale and issuance of an
aggregate of 2,941,177 shares of its Series E Preferred Stock (the "SHARES")
pursuant to this agreement;

         WHEREAS, Purchasers desire to purchase up to all of the Shares on the
terms and conditions set forth herein; and

         WHEREAS, the Company desires to issue and sell the Shares to Purchasers
on the terms and conditions set forth herein;

         NOW, THEREFORE, in consideration of the foregoing recitals and the
mutual promises hereinafter set forth, the parties hereto agree as follows:

SECTION 1. AGREEMENT TO SELL AND PURCHASE.

         1.1 AUTHORIZATION OF SHARES. On or prior to the Closing (as defined in
Section 2 below), the Company shall have authorized (i) the sale and issuance to
Purchasers of the Shares, and (ii) the issuance of such shares of Common Stock
to be issued upon conversion of the Shares (the "CONVERSION SHARES"). The Shares
and the Conversion Shares shall have the rights, preferences, privileges and
restrictions set forth in the Restated Certificate of Incorporation of the
Company in the form attached hereto as Exhibit B (the "RESTATED CERTIFICATE").

         1.2 SALE AND PURCHASE. Subject to the terms and conditions hereof, at
the Closing (as defined in Section 2 below), the Company hereby agrees to issue
and sell to each Purchaser, severally and not jointly, and each Purchaser agrees
to purchase from the Company, severally and not jointly, the number of Shares
set forth opposite such Purchaser's name on Exhibit A, at a purchase price of
Eight Dollars and Fifty Cents ($8.50) per share.

SECTION 2. CLOSING, DELIVERY AND PAYMENT.

         2.1 CLOSING. The closing of the sale and purchase of the Shares under
this Agreement (the "CLOSING") shall take place at 10:00 a.m. on September 13,
1999, at the offices of Cooley Godward LLP, 2595 Canyon Blvd., Suite 250,
Boulder, Colorado 80302, or at such other time or place as the Company and
Purchasers may mutually agree (such date is hereinafter referred to as the
"CLOSING DATE").

                                       1.
<PAGE>   7

         2.2 DELIVERY. At the Closing, subject to the terms and conditions
hereof, the Company will deliver to the Purchasers certificates representing the
number of Shares to be purchased at the Closing by each Purchaser, against
payment of the purchase price therefor by check or wire transfer of immediately
available funds made payable to the order of the Company.

SECTION 3. REPRESENTATIONS AND WARRANTIES OF THE COMPANY.

         Except as set forth on the Schedule of Exceptions (the "SCHEDULE OF
EXCEPTIONS") delivered to the Purchasers in connection with the purchase of
Shares hereunder, the Company hereby represents and warrants to each Purchaser
as follows:

         3.1 ORGANIZATION, GOOD STANDING AND QUALIFICATION. The Company is a
corporation duly organized, validly existing and in good standing under the laws
of the State of Delaware. The Company has all requisite corporate power and
authority to own and operate its properties and assets, to execute and deliver
this Agreement, the Investor Rights Agreement in the form attached hereto as
Exhibit C and the Shareholders Agreement attached hereto as Exhibit D
(collectively, the "RELATED AGREEMENTS"), to issue and sell the Shares and the
Conversion Shares and to carry out the provisions of this Agreement, the Related
Agreements and the Restated Certificate and to carry on its business as
presently conducted and as presently proposed to be conducted. The Company is
duly qualified and is authorized to do business and is in good standing as a
foreign corporation in Colorado and all other jurisdictions (including Toronto,
Canada) in which the nature of its activities and of its properties (both owned
and leased) makes such qualification necessary, except for those jurisdictions
in which failure to do so would not have a material adverse effect on the
Company or its business. The Company owns no equity securities of any other
corporation, limited partnership or similar entity. The Company is not a
participant in any joint venture, partnership or similar arrangement.

         3.2 CAPITALIZATION; VOTING RIGHTS. The authorized capital stock of the
Company, immediately prior to the Closing, will consist of (x) 20,000,000 shares
of Common Stock, 2,974,644 shares of which are issued and outstanding and
3,930,000 shares of which have been reserved for issuance to key employees and
consultants pursuant to the Company's 1995 Stock Option Plan, as amended, and
the Company's 1999 Equity Incentive Plan, of which 497,400 remain available for
issuance under such plans and (y) 11,782,583 shares of Preferred Stock, 337,420
of which are designated Series A Preferred Stock, 189,630 shares of which are
issued and outstanding, 3,132,535 of which are designated Series B Preferred
Stock, 3,118,785 shares of which are issued and outstanding, 2,954,784 of which
are designated Series C Preferred Stock, 2,946,088 shares of which are issued
and outstanding, 2,166,667 of which are designated Series D Preferred Stock,
2,166,667 shares of which are issued and outstanding and 3,191,177 of which are
designated Series E Preferred Stock, none of which are issued and outstanding.
All issued and outstanding shares of the Company's Common Stock and Preferred
Stock (i) have been duly authorized and validly issued to the persons listed on
Exhibit E hereto, (ii) are fully paid and nonassessable, and (iii) were issued
in compliance with all applicable state and federal laws concerning the issuance
of securities. The rights, preferences, privileges and restrictions of the
Shares are as stated in the Restated Certificate and are valid, binding and
enforceable in accordance with applicable law. The Conversion Shares have been
duly and validly reserved for issuance. Other than as set forth on Exhibit E,
and except as may be granted pursuant to the Related Agreements, there are no
outstanding options, warrants, rights (including conversion or

                                       2.
<PAGE>   8

preemptive rights and rights of first refusal), proxy or shareholder agreements,
or agreements of any kind for the purchase or acquisition from the Company of
any of its securities. There are no rights of first refusal with respect to the
issuance of the Shares and the subsequent conversion of the Shares into
Conversion Shares that have not been complied with or for which waivers have not
been obtained. When issued in compliance with the provisions of this Agreement
and the Restated Certificate, the Shares and the Conversion Shares will be
validly issued, fully paid and nonassessable with no personal liability
attaching to the ownership thereof, and will be free of any liens or
encumbrances; provided, however, that the Shares and the Conversion Shares may
be subject to restrictions on transfer under state and/or federal securities
laws as set forth herein or as otherwise required by such laws at the time a
transfer is proposed. The Company has no obligation to purchase, acquire or
redeem any of its outstanding securities. After giving effect to the
transactions contemplated hereby, all officers, directors and holders of one
percent (1%) of the outstanding capital stock of the Company are subject to a
market stand-off agreement in substantially the form contained in Section 2.13
of the Investor Rights Agreement.

         3.3 RIGHTS AND TERMS OF PREFERRED STOCK. The holders of Series A Stock,
Series B Stock, Series C Stock and Series D Stock do not have any rights or
privileges other than as reflected in the stock purchase agreements relating to
such series of Preferred Stock (the "PRIOR PURCHASE AGREEMENT(S)"), the Restated
Certificate and the Related Agreements, which agreements contain all material
terms relating to the issuances of shares of the Company's preferred stock and
the material relationships among the holders of such shares.

         3.4 AUTHORIZATION; BINDING OBLIGATIONS. All corporate action on the
part of the Company, its officers, directors and stockholders necessary for the
authorization of this Agreement and the Related Agreements, the performance of
all obligations of the Company hereunder and thereunder at the Closing and the
authorization, sale, issuance and delivery of the Shares pursuant hereto and the
Conversion Shares pursuant to the Restated Certificate have been taken or will
be taken prior to the Closing. The Agreement and the Related Agreements, when
executed and delivered, will be legal, valid and binding obligations of the
Company enforceable in accordance with their terms, except (i) as limited by
applicable bankruptcy, insolvency, reorganization, moratorium or other laws of
general application affecting enforcement of creditors' rights; (ii) general
principles of equity that restrict the availability of equitable remedies; and
(iii) to the extent that the enforceability of the indemnification provisions in
Section 2.9 of the Investor Rights Agreement may be limited by applicable laws.

         3.5 FINANCIAL STATEMENTS. The Company has delivered to each Purchaser
(i) its audited balance sheet as at December 31, 1998 and audited statement of
income and cash flows for the twelve months ending December 31, 1998 and (ii)
its unaudited balance sheet as at June 30, 1999 (the "STATEMENT DATE") and
unaudited consolidated statement of income and cash flows for the six month
period ending on the Statement Date (collectively, the "FINANCIAL STATEMENTS"),
copies of which are attached hereto as Exhibit F. The Financial Statements,
together with the notes thereto, are complete and correct in all material
respects, have been prepared in accordance with generally accepted accounting
principles applied on a consistent basis throughout the periods indicated,
except as disclosed therein, and present fairly the financial condition and
position of the Company as of December 31, 1998 and the Statement Date;
provided, however, that the financial statements as of the Statement Date are
subject to

                                       3.
<PAGE>   9

normal recurring year-end audit adjustments (which are not expected to be
material), and do not contain all footnotes required under generally accepted
accounting principles.

         3.6 LIABILITIES. The Company has no material liabilities and, to the
best of its knowledge, knows of no material contingent liabilities not disclosed
in the Financial Statements, except current liabilities incurred in the ordinary
course of business subsequent to the Statement Date which have not been, either
in any individual case or in the aggregate, materially adverse.

         3.7 AGREEMENTS; ACTION.

               (a) Except for agreements explicitly contemplated hereby and
agreements between the Company and its employees with respect to the sale of the
Company's Common Stock, there are no agreements, understandings or proposed
transactions between the Company and any of its officers, directors, affiliates
or any affiliate thereof.

               (b) There are no agreements, understandings, instruments,
contracts, proposed transactions, judgments, orders, writs or decrees to which
the Company is a party or by which it is bound which may involve (i) obligations
(contingent or otherwise) of, or payments to, the Company in excess of $50,000,
(ii) the license of any patent, copyright, trade secret or other proprietary
right to or from the Company (other than licenses arising from the purchase of
"off the shelf" or other standard products), (iii) provisions restricting or
affecting the development, manufacture or distribution of the Company's products
or services, or (iv) indemnification by the Company with respect to
infringements of proprietary rights (other than indemnification obligations
arising from purchase or sale agreements entered into in the ordinary course of
business).

               (c) The Company has not (i) declared or paid any dividends or
authorized or made any distribution upon or with respect to any class or series
of its capital stock, (ii) incurred any indebtedness which is currently
outstanding for money borrowed or any other liabilities (other than with respect
to indebtedness and other obligations incurred in the ordinary course of
business or as disclosed in the Financial Statements) individually in excess of
$50,000 or, in the case of indebtedness and/or liabilities individually less
than $50,000, in excess of $100,000 in the aggregate, (iii) made any loans or
advances to any person, other than ordinary advances for travel expenses, or
(iv) sold, exchanged or otherwise disposed of any of its assets or rights, other
than the sale of its inventory in the ordinary course of business.

               (d) For the purposes of subsections (b) and (c) above, all
indebtedness, liabilities, agreements, understandings, instruments, contracts
and proposed transactions involving the same person or entity (including persons
or entities the Company has reason to believe are affiliated therewith) shall be
aggregated for the purpose of meeting the individual minimum dollar amounts of
such subsections.

               (e) The Company has performed all material obligations required
to be performed by it as of the date hereof under any material agreement to
which the Company is a party or by which it is bound. There are no agreements
not otherwise disclosed that could reasonably be expected to materially and
adversely affect the Company. No party to any such material contract has
notified the Company with a claim to the effect that the Company has failed

                                       4.
<PAGE>   10

to perform an obligation thereunder. To the knowledge of the Company, there is
no plan, intention or indication of any contracting party to such material
contract to cause the termination, cancellation or modification of such material
contract or to reduce or otherwise change its activity thereunder so as to
materially and adversely effect the benefits derived as expected to be derived
therefrom by the Company.

               (f) The Company has not engaged in the past three (3) months in
any discussion (i) with any representative of any corporation or corporations
regarding the consolidation or merger of the Company with or into any such
corporation or corporations, (ii) with any corporation, partnership, association
or other business entity or any individual regarding the sale, conveyance or
disposition of all or substantially all of the assets of the Company or a
transaction or series of related transactions in which more than fifty percent
(50%) of the voting power of the Company is disposed of, or (iii) regarding any
other form of acquisition, liquidation, dissolution or winding up of the
Company.

         3.8 OBLIGATIONS TO RELATED PARTIES. There are no obligations of the
Company to officers, directors or employees of the Company other than (a) for
payment of salary for services rendered, (b) reimbursement for reasonable
expenses incurred on behalf of the Company, (c) for other standard employee
benefits made generally available to all employees (including stock option
agreements outstanding under any stock option plan approved by the Board of
Directors of the Company). None of the officers or directors who are employees
of the Company, or any members of their immediate families, are indebted to the
Company or have any direct or indirect ownership interest in any firm or
corporation with which the Company is affiliated or with which the Company has a
business relationship, or any firm or corporation which competes with the
Company, except that officers, directors and/or stockholders of the Company may
own stock in publicly traded companies which may compete with the Company. No
officer or director who is an employee of the Company, or any member of their
immediate families, is, directly or indirectly, interested in any material
contract with the Company (other than such contracts as relate to any such
person's ownership of capital stock or other securities of the Company). Except
as may be disclosed in the Financial Statements, the Company is not a guarantor
or indemnitor of any indebtedness of any other person, firm or corporation.

         3.9 CHANGES. Since the Statement Date, there has not been to the
Company's knowledge:

               (a) Any change in the assets, liabilities, financial condition or
operations of the Company from that reflected in the Financial Statements, other
than changes in the ordinary course of business, none of which individually or
in the aggregate has had or is expected to have a material adverse effect on
such assets, liabilities, financial condition or operations of the Company;

               (b) Any resignation or termination of any key officers of the
Company; and the Company, to the best of its knowledge, does not know of the
impending resignation or termination of employment of any such officer;

               (c) Any material change, except in the ordinary course of
business, in the contingent obligations of the Company by way of guaranty,
endorsement, indemnity, warranty or

                                       5.
<PAGE>   11

otherwise, and the Company has not incurred indebtedness for borrowed money in
excess of $25,000;

               (d) Any damage, destruction or loss, whether or not covered by
insurance, materially and adversely affecting the properties, business or
prospects or financial condition of the Company;

               (e) Any waiver by the Company of a valuable right or of a
material debt owed to it;

               (f) Any direct or indirect loans made by the Company to any
stockholder, employee, officer or director of the Company, other than advances
made in the ordinary course of business;

               (g) Any material change in any compensation arrangement or
agreement with any employee, officer, director or stockholder;

               (h) Any declaration or payment of any dividend or other
distribution of the assets of the Company or any repurchase or redemption of any
outstanding security of the Company;

               (i) Any labor organization activity;

               (j) Any debt, obligation or liability incurred, assumed or
guaranteed by the Company, except those for immaterial amounts and for current
liabilities incurred in the ordinary course of business;

               (k) Any sale, assignment or transfer of any patents, trademarks,
copyrights, trade secrets or other intangible assets;

               (l) Any issuance of any capital stock (or rights or options to
acquire capital stock of the Company), other than options granted pursuant to
the Company's 1995 Stock Option Plan, as amended, and the Company's 1999 Equity
Incentive Plan, and reflected in Section 3.2 hereof;

               (m) Any change in any material agreement to which the Company is
a party or by which it is bound which materially and adversely affects the
business, assets, liabilities, financial condition, operations or prospects of
the Company, including compensation agreements with the Company's employees;

               (n) Any other event or condition of any character that, either
individually or cumulatively, has materially and adversely affected the
business, assets, liabilities, financial condition, operations or prospects of
the Company; or

               (o) Any arrangement or commitment by the Company to take any of
the actions described in this Section 3.9.

                                       6.
<PAGE>   12

         3.10 TITLE TO PROPERTIES AND ASSETS; LIENS, ETC. The Company has good
and marketable title to its properties and assets, including the properties and
assets reflected in the most recent balance sheet included in the Financial
Statements, and good title to its leasehold estates, in each case subject to no
mortgage, pledge, security interest, lien, lease, encumbrance or charge, other
than (i) those resulting from taxes which have not yet become delinquent and
(ii) minor liens and encumbrances which do not materially detract from the value
of the property subject thereto or materially impair the operations of the
Company. All facilities, machinery, equipment, fixtures, vehicles and other
properties owned, leased or used by the Company are in good operating condition
and repair and are reasonably fit and usable for the purposes for which they are
being used.

         3.11 PATENTS AND TRADEMARKS. The Company owns or possesses sufficient
legal rights to all patents, and, to the best of its knowledge after reasonable
investigation, all trademarks, service marks, trade names, copyrights, trade
secrets, information and other proprietary rights and processes necessary for
its business as now conducted and as proposed to be conducted, without any known
infringement of the rights of others. Set forth on the Schedule of Exceptions is
a list of the Company's patents, pending patent applications, registered
trademarks and pending trademark applications. There are no outstanding options,
licenses or agreements of any kind relating to the foregoing, nor is the Company
bound by or a party to any options, licenses or agreements of any kind with
respect to the patents, trademarks, service marks, trade names, copyrights,
trade secrets, licenses, information and other proprietary rights and processes
of any other person or entity other than such licenses or agreements arising
from the purchase of "off the shelf" or standard products. The Company has not
received any communications alleging that the Company has violated or, by
conducting its business as proposed, would violate any of the patents,
trademarks, service marks, trade names, copyrights or trade secrets or other
proprietary rights of any other person or entity, nor to the Company's
knowledge, is there a basis for any such claim. The manufacture, marketing,
license, sale or intended use of any product currently licensed or sold by the
Company is not in material breach of any material license or agreement between
the Company and any third party and, to the best of the Company's knowledge, has
not infringed any intellectual property right of any other party. There is no
pending or, to the best of the Company's knowledge, threatened claim or
litigation contesting the validity, ownership or right to use, sell, license or
dispose of any proprietary assets. The Company is not aware that any of its
employees is obligated under any contract (including licenses, covenants or
commitments of any nature) or other agreement, or subject to any judgment,
decree or order of any court or administrative agency, that would interfere with
their duties to the Company or that would conflict with the Company's business
as proposed to be conducted. Neither the execution nor delivery of this
Agreement, nor the carrying on of the Company's business by the employees of the
Company, nor the conduct of the Company's business as proposed, will, to the
Company's knowledge, conflict with or result in a breach of the terms,
conditions or provisions of, or constitute a default under, any contract,
covenant or instrument under which any employee is now obligated. The Company
does not believe it is or will be necessary to utilize any inventions, trade
secrets or proprietary information of any of its employees made prior to their
employment by the Company, except for inventions, trade secrets or proprietary
information that have been assigned to the Company.

         3.12 COMPLIANCE WITH OTHER INSTRUMENTS. The Company is not in violation
or default of any term of its Restated Certificate or Bylaws, or of any
provision of any mortgage,

                                       7.
<PAGE>   13

indenture, agreement, instrument or contract to which it is party or by which it
is bound or of any judgment, decree, order, writ or, to its knowledge, any
statute, rule or regulation applicable to the Company which would materially and
adversely affect the business, assets, liabilities, financial condition,
operations or prospects of the Company. The execution, delivery, and performance
of and compliance with this Agreement and the Related Agreements, and the
issuance and sale of the Shares pursuant hereto and of the Conversion Shares
pursuant to the Restated Articles, will not, with or without the passage of time
or giving of notice, result in any such material violation, or be in conflict
with or constitute a default under any such term, violate (to the Company's best
knowledge) any securities laws applicable to the Company, or result in the
creation of any mortgage, pledge, lien, encumbrance or charge upon any of the
properties or assets of the Company or the suspension, revocation, impairment,
forfeiture or nonrenewal of any permit license, authorization or approval
applicable to the Company, its business or operations or any of its assets or
properties.

         3.13 LITIGATION. There is no action, suit, proceeding or investigation
pending or to the Company's knowledge currently threatened against the Company
that questions the validity of this Agreement or the Related Agreements or the
right of the Company to enter into any of such agreements or to consummate the
transactions contemplated hereby or thereby, or that might result, either
individually or in the aggregate, in any material adverse change in the assets,
condition, affairs or prospects of the Company, financially or otherwise, or any
change in the current equity ownership of the Company, nor is the Company aware
that there is any basis for the foregoing. The foregoing includes, without
limitation, actions pending or threatened (or any basis therefor known to the
Company) involving the current or prior employment of any of the Company's
employees, their use in connection with the Company's business of any
information or techniques allegedly proprietary to any of their former
employers, or their obligations under any agreements with prior employers. The
Company is not a party or subject to the provisions of any order, writ,
injunction, judgment or decree of any court or government agency or
instrumentality. There is no action, suit, proceeding or investigation by the
Company currently pending or which the Company intends to initiate.

         3.14 TAX RETURNS AND PAYMENTS. The Company has timely filed all tax
returns (federal, state and local) and reports required to be filed by it and
these returns and reports are true and correct in all material respects. All
taxes shown to be due and payable on such returns, any assessments imposed, and,
to the Company's knowledge, all other taxes due and payable by the Company on or
before the Closing have been paid or will be paid prior to the time they become
delinquent. The Company has not been advised (i) that any of its returns,
federal, state or other, have been or are being audited as of the date hereof,
or (ii) of any deficiency in assessment or proposed judgment to its federal,
state or other taxes. The Company has no knowledge of any liability of any tax
to be imposed upon its properties or assets as of the date of this Agreement
that is not adequately provided for.

         3.15 EMPLOYEES. The Company has no collective bargaining agreements
with any of its employees. There is no labor union organizing activity pending
or, to the Company's knowledge, threatened with respect to the Company. There is
no strike or labor dispute pending or, to the best knowledge of the Company,
threatened with respect to the Company. No employee has any agreement or
contract, written or verbal, regarding his employment (except with respect to
the sale of the Company's Common Stock or options therefor). The Company is

                                       8.
<PAGE>   14

not a party to or bound by any currently effective employment contract, deferred
compensation arrangement, bonus plan, incentive plan, profit sharing plan,
retirement agreement or other employee compensation plan or agreement (except
with respect to the sale of the Company's Common Stock or options therefor). No
wages are due to employees, except for those incurred during the current pay
period. To the Company's knowledge, no employee of the Company, nor any
consultant with whom the Company has contracted, is in violation of any term of
any employment contract, proprietary information agreement or any other
agreement relating to the right of any such individual to be employed by, or to
contract with, the Company because of the nature of the business to be conducted
by the Company; and, to the Company's knowledge, the continued employment by the
Company of its present employees, and the performance of the Company's contracts
with its independent contractors, will not result in any such violation. The
Company has not received any notice from any previous, current or prospective
employee, consultant or other individual alleging that any such violation has
occurred. No employee of the Company has been granted the right to continued
employment by the Company or to any material compensation following termination
of employment with the Company. The Company is not aware that any officer or key
employee, or that any group of key employees, intends to terminate their
employment with the Company. Employment of each officer and employee of the
Company is terminable at the will of the Company.

         3.16 NON-COMPETITION AND NON-DISCLOSURE AGREEMENTS. Each former and
current employee, officer and consultant of the Company has executed an
agreement regarding non-competition and/or non-disclosure of the Company's
confidential information in one of the forms attached as Exhibit G hereto or an
agreement containing substantially the same restrictions as those set forth in
such forms. The Company is not aware that any of its employees, executive
officers, or consultants is in violation thereof. All consultants to the Company
with access to confidential information of the Company are parties to a written
agreement substantially in the form of forms attached as Exhibit G. The Company
is not aware that any of its consultants are in violation thereof. No current
employee, officer or consultant of the Company has excluded works or inventions
made prior to his or her employment with the Company from his or her assignment
of inventions pursuant to such employee, officer or consultant's agreement
regarding confidential information and invention assignment that the Company
deems to be materially relevant to its business. The Company has taken
reasonable security measures to maintain the confidentiality of the Company's
proprietary information.

         3.17 OBLIGATIONS OF MANAGEMENT. Each officer and key employee of the
Company is currently devoting one hundred percent (100%) of his or her business
time to the conduct of the business of the Company. The Company is not aware of
any officer or key employee of the Company planning to work less than full time
at the Company in the future.

         3.18 REGISTRATION RIGHTS. Except as required pursuant to the Investor
Rights Agreement, the Company is presently not under any obligation, and has not
granted any rights, to register (as defined in Section 1.2 of the Investor
Rights Agreement) any of the Company's presently outstanding securities or any
of its securities that may hereafter be issued.

         3.19 COMPLIANCE WITH LAWS; PERMITS. To its knowledge, the Company is
not in violation of any applicable statute, rule, regulation, order or
restriction of any domestic or foreign government or any instrumentality or
agency thereof in respect of the conduct of its

                                       9.
<PAGE>   15

business or the ownership of its properties which violation would materially and
adversely affect the business, assets, liabilities, financial condition,
operations or prospects of the Company. No governmental orders, permissions,
consents, approvals or authorizations are required to be obtained and no
registrations or declarations are required to be filed in connection with the
execution and delivery of this Agreement and the issuance of the Shares or the
Conversion Shares, except such as has been duly and validly obtained or filed
or, with respect to any filings that must be made after the Closing, as will be
filed in a timely manner. The Company has all franchises, permits, licenses and
any similar authority necessary for the conduct of its business as now being
conducted by it, the lack of which could materially and adversely affect the
business, properties, prospects or financial condition of the Company, and
believes it can obtain, without undue burden or expense, any similar authority
for the conduct of its business as planned to be conducted. All required reports
and filings have been properly made as and when required, except where the
failure to report or file would not, individually or in the aggregate, have a
materially adverse effect on the Company.

         3.20 ENVIRONMENTAL AND SAFETY LAWS. To its knowledge, the Company is
not in violation of any applicable statute, law or regulation relating to the
environment or occupational health and safety, and to its knowledge, no material
expenditures are or will be required in order to comply with any such existing
statute, law or regulation.

         3.21 OFFERING VALID. Assuming the accuracy of the representations and
warranties of the Purchasers contained in Section 4.2 hereof, the offer, sale
and issuance of the Shares and the Conversion Shares will be exempt from the
registration requirements of the Securities Act of 1933, as amended (the
"SECURITIES ACT") and will have been registered or qualified (or are exempt from
registration and qualification) under the registration, permit or qualification
requirements of all applicable state securities laws. Neither the Company nor
any agent on its behalf has solicited or will solicit any offers to sell or has
offered to sell or will offer to sell all or any part of the Shares to any
person or persons so as to bring the sale of such Shares by the Company within
the registration provisions of the Securities Act.

         3.22 FULL DISCLOSURE. This Agreement, the Exhibits hereto, the Related
Agreements and any certificate delivered by the Company to the Purchasers or
their attorneys or agents in connection herewith or therewith or with the
transactions contemplated hereby or thereby do not contain any untrue statement
of a material fact nor, to the Company's knowledge after reasonable
investigation, omit to state a material fact necessary in order to make the
statements contained herein or therein not misleading. To the Company's
knowledge after reasonable investigation, there are no facts which (individually
or in the aggregate) materially adversely affect the business, assets,
liabilities, financial condition, prospects or operations of the Company that
have not been set forth in this Agreement, the Exhibits hereto, the Related
Agreements or in other documents delivered to the Purchasers or their attorneys
or agents in connection herewith or therewith.

         3.23 QUALIFIED SMALL BUSINESS. The Company represents and warrants to
the Purchasers that the Shares qualify as "Qualified Small Business Stock" as
defined in Section 1202(c) of the Internal Revenue Code of 1986, as amended (the
"CODE"), as of the date hereof. The Company will use reasonable efforts to
comply with the reporting and record keeping requirements of Section 1202 of the
Code, any regulations promulgated thereunder and any

                                      10.
<PAGE>   16

similar state laws and regulations. The Company agrees not to repurchase any
stock of the Company if such repurchase would cause such Shares not to so
qualify as "Qualified Small Business Stock" unless the Board of Directors
otherwise determines that such repurchase would be in the best interests of the
Company.

         3.24 MINUTE BOOKS. The minute books of the Company provided to the
Purchasers contain a complete summary of all meetings of directors and
stockholders since July 18, 1996.

         3.25 SECTION 83(b) ELECTIONS. To the Company's knowledge, all elections
and notices permitted by Section 83(b) of the Internal Revenue Code and any
analogous provisions of applicable state tax laws have been timely filed by all
employees who have purchased shares of the Company's Common Stock under
agreements that provide for the vesting of such shares.

         3.26 REAL PROPERTY HOLDING CORPORATION. The Company is not a real
property holding corporation within the meaning of Internal Revenue Code Section
897(c)(2) and any regulations promulgated thereunder.

         3.27 INSURANCE. The Company maintains fire and casualty insurance
policies and other insurance coverage customary for companies similarly situated
to the Company.

         3.28 INVESTMENT COMPANY ACT. The Company is not an "investment
company", or a company "controlled" by an "investment", within the meaning of
the Investment Company Act of 1940, as amended.

         3.29 ERISA. The Company has complied in all material respects with the
applicable rules and regulations of the Employee Retirement Income Security Act
of 1974, as amended, with respect to any employee benefit plans subject thereto.

         3.30 YEAR 2000. The software programs which the Company has developed
and licenses (the "LICENSED Programs") directly and indirectly through third
parties, are Year 2000 Compliant. "YEAR 2000 COMPLIANT" means the ability to (a)
consistently handle date information before, during, and after January 1, 2000,
including accepting date input, providing date output, and processing dates or
portions of dates; (b) function before, during, and after January 1, 2000,
without the need for program changes caused by the advent of the new century;
and (c) store and provide output of date information in ways that are
unambiguous as to century. This representation does not apply to output,
results, errors, or abnormal terminations caused by (i) errors not attributable
to date-specific data, (ii) any modifications of the Licensed Programs made by
or on behalf of a licensee of the Company, and (iii) any data provided to the
Licensed Program which does not specify the century or is incorrect or
ambiguous.

         3.31 USE OF PROCEEDS. The Company will use proceeds from the sale of
the Purchased Shares for working capital purposes. Such proceeds shall not be
used to repay indebtedness to any shareholders of the Company.

         3.32 SIGNIFICANT CUSTOMERS AND SUPPLIERS. To the Company's best
knowledge, no customer or supplier that was material to the Company during the
period from January 1, 1999 to the date hereof has terminated, materially
reduced or threatened to terminate or materially reduce its purchases from or
provisions of products or services to, the Company, as the case may be.

                                      11.
<PAGE>   17

SECTION 4. REPRESENTATIONS AND WARRANTIES OF THE PURCHASERS.

         Each Purchaser, severally and not jointly, hereby represents and
warrants to the Company as of the Closing as follows (such representations and
warranties do not lessen or obviate the representations and warranties of the
Company set forth in this Agreement):

         4.1 REQUISITE POWER AND AUTHORITY. Purchaser has all necessary power
and authority under all applicable provisions of law to execute and deliver this
Agreement and the Related Agreements and to carry out their provisions. All
action on Purchaser's part required for the lawful execution and delivery of
this Agreement and the Related Agreements have been or will be effectively taken
prior to the Closing. Upon their execution and delivery, this Agreement and the
Related Agreements will be valid and binding obligations of Purchaser,
enforceable in accordance with their terms, except (i) as limited by applicable
bankruptcy, insolvency, reorganization, moratorium or other laws of general
application affecting enforcement of creditors' rights, (ii) general principles
of equity that restrict the availability of equitable remedies, and (iii) to the
extent that the enforceability of the indemnification provisions of Section 2.9
of the Investor Rights Agreement may be limited by applicable laws.

         4.2 INVESTMENT REPRESENTATIONS. Purchaser understands that the Shares
and the Conversion Shares have not been registered under the Securities Act.
Purchaser also understands that the Shares are being offered and sold pursuant
to an exemption from registration contained in the Securities Act based in part
upon Purchaser's representations contained in the Agreement. Purchaser hereby
represents and warrants as follows:

               (a) PURCHASER BEARS ECONOMIC RISK. Purchaser has substantial
experience in evaluating and investing in private placement transactions of
securities in companies similar to the Company so that it is capable of
evaluating the merits and risks of its investment in the Company and has the
capacity to protect its own interests. Purchaser must bear the economic risk of
this investment indefinitely unless the Shares (or the Conversion Shares) are
registered pursuant to the Securities Act or an exemption from registration
thereunder is available. Purchaser understands that the Company has no present
intention of registering the Shares, the Conversion Shares or any shares of its
Common Stock. Purchaser also understands that there is no assurance that any
exemption from registration under the Securities Act will be available and that,
even if available, such exemption may not allow Purchaser to transfer all or any
portion of the Shares or the Conversion Shares under the circumstances, in the
amounts or at the times Purchaser might propose.

               (b) ACQUISITION FOR OWN ACCOUNT. Purchaser is acquiring the
Shares and the Conversion Shares for Purchaser's own account for investment only
and not with a view towards their distribution.

               (c) PURCHASER CAN PROTECT ITS INTEREST. Purchaser represents that
by reason of its, or of its management's, business or financial experience,
Purchaser has the capacity to protect its own interests in connection with the
transactions contemplated in this Agreement and the Related Agreements. Further,
Purchaser is aware of no publication of any advertisement in connection with the
transactions contemplated in the Agreement.

                                      12.
<PAGE>   18

               (d) ACCREDITED INVESTOR. Purchaser represents that it is an
accredited investor within the meaning of Regulation D under the Securities Act.

               (e) COMPANY INFORMATION. Purchaser has received and read the
Financial Statements and has had an opportunity to discuss the Company's
business, management and financial affairs with directors, officers and
management of the Company and has had the opportunity to review the Company's
operations and facilities. Purchaser has also had the opportunity to ask
questions of, and receive answers from, the Company and its management regarding
the terms and conditions of this investment.

               (f) RULE 144. Purchaser acknowledges and agrees that the Shares,
and, if issued, the Conversion Shares must be held indefinitely unless they are
subsequently registered under the Securities Act or an exemption from such
registration is available. Purchaser has been advised or is aware of the
provisions of Rule 144 promulgated under the Securities Act, which permits
limited resale of shares purchased in a private placement subject to the
satisfaction of certain conditions, including, among other things: the
availability of certain current public information about the Company, the resale
occurring not less than one year after a party has purchased and paid for the
security to be sold, the sale being through an unsolicited "broker's
transaction" or in transactions directly with a market maker (as said term is
defined under the Securities Exchange Act of 1934, as amended), and the number
of shares being sold during any three-month period not exceeding specified
limitations.

               (g) RESIDENCE. If the Purchaser is an individual, the Purchaser
resides in the state or province identified in the address of the Purchaser set
forth on Exhibit A; if the Purchaser is a partnership, corporation, limited
liability company or other entity, the office or offices of the Purchaser in
which its investment decision was made is located at the address or addresses of
the Purchaser set forth on Exhibit A.

         4.3 TRANSFER RESTRICTIONS. Each Purchaser acknowledges and agrees that
the Shares and, if issued, the Conversion Shares are subject to restrictions on
transfer as set forth in the Investor Rights Agreement.

SECTION 5. CONDITIONS TO CLOSING.

         5.1 CONDITIONS TO PURCHASERS' OBLIGATIONS AT THE CLOSING. Each
Purchaser's obligations to purchase the Shares at the Closing are subject to the
satisfaction, at or prior to the Closing, of the following conditions:

               (a) REPRESENTATIONS AND WARRANTIES TRUE; PERFORMANCE OF
OBLIGATIONS. The representations and warranties made by the Company in Section 3
hereof shall be true and correct as of the Closing Date with the same force and
effect as if they had been made as of the Closing Date, and the Company shall
have performed all obligations and conditions herein required to be performed or
observed by it on or prior to the Closing.

               (b) LEGAL INVESTMENT. On the Closing Date, the sale and issuance
of the Shares, and the proposed issuance of the Conversion Shares, shall be
legally permitted by all laws and regulations to which Purchasers and the
Company are subject.

                                      13.
<PAGE>   19

               (c) CONSENTS, PERMITS, AND WAIVERS. The Company shall have
obtained any and all consents, permits and waivers necessary or appropriate for
consummation of the transactions contemplated by the Agreement and the Related
Agreements (except for such as may be properly obtained subsequent to the
Closing).

               (d) FILING OF RESTATED CERTIFICATE. The Restated Certificate
shall have been filed with and accepted by the Secretary of State of the State
of Delaware.

               (e) CORPORATE DOCUMENTS. The Company shall have delivered to
Purchasers or their counsel copies of all corporate documents of the Company as
Purchasers shall reasonably request, including without limitation, its Restated
Certificate and Bylaws.

               (f) RESERVATION OF CONVERSION SHARES. The Conversion Shares
issuable upon conversion of the Shares shall have been duly authorized and
reserved for issuance upon such conversion.

               (g) COMPLIANCE CERTIFICATE. The Company shall have delivered to
Purchasers a Compliance Certificate, executed by the President of the Company,
dated the date of the Closing, to the effect that the conditions specified in
subsections (a), (c), (d) and (f) of this Section 5.1 have been satisfied.

               (h) INVESTOR RIGHTS AGREEMENT. An Investor Rights Agreement
substantially in the form attached hereto as Exhibit C shall have been executed
and delivered by the parties thereto.

               (i) SHAREHOLDERS AGREEMENT. A Shareholders Agreement
substantially in the form attached hereto as Exhibit D shall have been executed
and delivered by the parties thereto.

               (j) LEGAL OPINION. The Purchasers shall have received from legal
counsel to the Company an opinion addressed to the Purchasers, dated as of the
Closing Date, substantially in the form attached hereto as Exhibit H.

               (k) SBA MATTERS. The Company shall have (i) executed and
delivered to each Purchaser that is a licensed Small Business Investment Company
a Size Status Declaration on SBA Form 480, an Assurance of Compliance on SBA
Form 652 and an SBA Certification in the form provided to the Company and (ii)
provided to each such Purchaser information necessary for the preparation of a
Portfolio Financing Report on SBA Form 1031.

               (l) PROCEEDINGS AND DOCUMENTS. All corporate and other
proceedings in connection with the transactions contemplated hereby and all
documents and instruments incident to such transactions shall be reasonably
satisfactory in substance and form to the Purchasers and their special counsel,
and the Purchasers and their special counsel shall receive all such counterpart
originals or certified or other copies of such documents as they may reasonably
request.

               (m) SECURITIES EXEMPTIONS. The offer and sale of the Purchased
Shares to the Purchasers pursuant to this Agreement shall be exempt from the
registration requirements of the

                                      14.
<PAGE>   20

Securities Exchange Act of 1933, as amended, the registration and/or
qualification requirements of all other applicable federal and state securities
laws.

               (n) PROCEEDINGS AND DOCUMENTS. All corporate and other
proceedings in connection with the transactions contemplated at the Closing Date
and all documents incident thereto shall be reasonably satisfactory in form and
substance to each Purchaser and the Purchaser's special counsel, and they shall
each have received all such counterpart originals and certified or other copies
of such documents as they may reasonably request. Such documents shall include
(but not be limited to) the following:

                    (i) Certified Charter Documents. A copy of the Restated
Certificate and the Bylaws of the Company (as amended through the Closing Date),
certified by the Secretary of the Company as true and correct copies thereof as
of the Closing Date.

                    (ii) Corporate Actions. A copy of the resolutions of the
Board of Directors and, if required, the stockholders of the Company evidencing
the amendment to the Company's Certificate of Incorporation providing for the
authorization of the Series E Stock, the approval of this Agreement and the
Third Amended and Restated Investor Rights Agreement, the issuance of the Shares
and the other matters contemplated hereby, and a copy of the Bylaws of the
Company, certified by the Security of the Company to be true, complete and
correct.

         5.2 CONDITIONS TO OBLIGATIONS OF THE COMPANY. The Company's obligation
to issue and sell the Shares at the Closing is subject to the satisfaction, on
or prior to the Closing, of the following conditions:

               (a) REPRESENTATIONS AND WARRANTIES TRUE. The representations and
warranties made by Purchasers in Section 4 hereof shall be true and correct at
the date of the Closing with the same force and effect as if they had been made
on and as of said date.

               (b) PERFORMANCE OF OBLIGATIONS. Purchasers shall have performed
and complied with all agreements and conditions herein required to be performed
or complied with by Purchasers on or before the Closing.

               (c) FILING OF RESTATED CERTIFICATE. The Restated Certificate
shall have been filed and accepted by the Secretary of State of the State of
Delaware.

               (d) INVESTOR RIGHTS AGREEMENT. An Investor Rights Agreement
substantially in the form attached hereto as Exhibit C shall have been executed
and delivered by the Purchasers.

               (e) SHAREHOLDERS AGREEMENT. A Shareholders Agreement
substantially in the form attached hereto as Exhibit D shall have been executed
and delivered by the parties thereto.

               (f) CONSENTS, PERMITS, AND WAIVERS. The Company shall have
obtained any and all consents, permits and waivers necessary or appropriate for
consummation of the transactions contemplated by the Agreement and the Related
Agreements (except for such as may be properly obtained subsequent to the
Closing).

                                      15.
<PAGE>   21

SECTION 6. MISCELLANEOUS.

         6.1 GOVERNING LAW. This Agreement shall be governed in all respects by
the laws of the State of Delaware as such laws are applied to agreements between
Delaware residents entered into and performed entirely in Delaware.

         6.2 SURVIVAL. The representations, warranties, covenants and agreements
made herein shall survive any investigation made by any Purchaser and the
closing of the transactions contemplated hereby. All statements as to factual
matters contained in any certificate or other instrument delivered by or on
behalf of the Company pursuant hereto in connection with the transactions
contemplated hereby shall be deemed to be representations and warranties by the
Company hereunder solely as of the date of such certificate or instrument.

         6.3 SUCCESSORS AND ASSIGNS. Except as otherwise expressly provided
herein, the provisions hereof shall inure to the benefit of, and be binding
upon, the successors, assigns, heirs, executors and administrators of the
parties hereto and shall inure to the benefit of and be enforceable by each
person who shall be a holder of the Shares from time to time.

         6.4 ENTIRE AGREEMENT. This Agreement, the Exhibits and Schedules
hereto, the Related Agreements and the other documents delivered pursuant hereto
constitute the full and entire understanding and agreement between the parties
with regard to the subjects hereof and no party shall be liable or bound to any
other in any manner by any representations, warranties, covenants and agreements
except as specifically set forth herein and therein.

         6.5 SEVERABILITY. In case any provision of the Agreement shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions shall not in any way be affected or impaired thereby.

         6.6 AMENDMENT AND WAIVER.

               (a) This Agreement may be amended or modified only upon the
written consent of the Company and holders of at least a majority of the Shares
(treated as if converted and including any Conversion Shares into which the
Shares have been converted that have not been sold to the public).

               (b) The obligations of the Company and the rights of the holders
of the Shares and the Conversion Shares under the Agreement may be waived only
with the written consent of the holders of at least a majority of the Shares
(treated as if converted and including any Conversion Shares into which the
Shares have been converted that have not been sold to the public).

         6.7 DELAYS OR OMISSIONS. It is agreed that no delay or omission to
exercise any right, power or remedy accruing to any party, upon any breach,
default or noncompliance by another party under this Agreement, the Related
Agreements or the Restated Certificate, shall impair any such right, power or
remedy, nor shall it be construed to be a waiver of any such breach, default or
noncompliance, or any acquiescence therein, or of or in any similar breach,
default or noncompliance thereafter occurring. It is further agreed that any
waiver, permit, consent or approval of any kind or character on any Purchaser's
part of any breach, default or

                                      16.
<PAGE>   22

noncompliance under this Agreement, the Related Agreements or under the Restated
Certificate or any waiver on such party's part of any provisions or conditions
of the Agreement, the Related Agreements, or the Restated Certificate must be in
writing and shall be effective only to the extent specifically set forth in such
writing. All remedies, either under this Agreement, the Related Agreements, the
Restated Certificate, by law, or otherwise afforded to any party, shall be
cumulative and not alternative.

         6.8 NOTICES. All notices required or permitted hereunder shall be in
writing and shall be deemed effectively given: (i) upon personal delivery to the
party to be notified; (ii) when sent by confirmed telex or facsimile if sent
during normal business hours of the recipient, if not, then on the next business
day; (iii) five (5) days after having been sent by registered or certified mail,
return receipt requested, postage prepaid; or (iv) one (1) business day after
deposit with a nationally recognized overnight courier, specifying next day
delivery, with written verification of receipt. All communications shall be sent
to the Company at the address as set forth on the signature page hereof and to
Purchaser at the address set forth on Exhibit A attached hereto or at such other
address as the Company or Purchaser may designate by ten (10) days advance
written notice to the other parties hereto.

         6.9 EXPENSES. Each party shall pay all costs and expenses that it
incurs with respect to the negotiation, execution, delivery and performance of
the Agreement.

         6.10 ATTORNEYS' FEES. In the event that any dispute among the parties
to this Agreement should result in litigation, the prevailing party in such
dispute shall be entitled to recover from the losing party all fees, costs and
expenses of enforcing any right of such prevailing party under or with respect
to this Agreement, including without limitation, such reasonable fees and
expenses of attorneys and accountants, which shall include, without limitation,
all fees, costs and expenses of appeals.

         6.11 TITLES AND SUBTITLES. The titles of the sections and subsections
of the Agreement are for convenience of reference only and are not to be
considered in construing this Agreement.

         6.12 COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which shall be an original, but all of which together
shall constitute one instrument.

         6.13 BROKER'S FEES. Each party hereto represents and warrants that no
agent, broker, investment banker, person or firm acting on behalf of or under
the authority of such party hereto is or will be entitled to any broker's or
finder's fee or any other commission directly or indirectly in connection with
the transactions contemplated herein. Each party hereto further agrees to
indemnify each other party for any claims, losses or expenses incurred by such
other party as a result of the representation in this Section 6.13 being untrue.

         6.14 EXCULPATION AMONG PURCHASERS. Each Purchaser acknowledges that it
is not relying upon any person, firm, or corporation, other than the Company and
its officers and directors in making its investment or decision to invest in the
Company. Each Purchaser agrees that no Purchaser nor the respective controlling
persons, officers, directors, partners, agents, or employees of any Purchaser
shall be liable for any action heretofore or hereafter taken or omitted to be
taken by any of them in connection with the Shares and Conversion Shares.

                                      17.
<PAGE>   23

         6.15 PRONOUNS. All pronouns contained herein, and any variations
thereof, shall be deemed to refer to the masculine, feminine or neutral,
singular or plural, as to the identity of the parties hereto may require.

                      [THIS SPACE INTENTIONALLY LEFT BLANK]

                                      18.
<PAGE>   24

         IN WITNESS WHEREOF, the parties hereto have executed the SERIES E
PREFERRED STOCK PURCHASE AGREEMENT as of the date set forth in the first
paragraph hereof.

<TABLE>
<S>                                                   <C>
COMPANY:                                              PURCHASER:

REQUISITE TECHNOLOGY, INC.                            SPINNAKER CLIPPER
By: /s/ BARBARA MOWRY                                 By: /s/ ERIC MOORE
   -------------------------------------                 -----------------------------------------
   Barbara Mowry
   President and Chief Executive Officer              SPINNAKER CROSSOVER INSTITUTIONAL FUND, L.P.
   Officer
                                                      By: /s/ ERIC MOORE
                                                         -----------------------------------------
   Address:     10355 Westmoor Drive                    SPINNAKER CROSSOVER FUND, L.P.
                Suite 205
                Westminster, CO 80021                 By: /s/ ERIC MOORE
                                                         -----------------------------------------

                                                     COVESTCO-MEDEURA, LLC
                                                      By:   Medeura Limited

                                                      By: /s/ ALBIN A. JOHANN
                                                         -----------------------------------------
                                                         Director

                                                      H&Q REQUISITE TECHNOLOGY INVESTORS, L.P.

                                                      By: /s/
                                                         -----------------------------------------

                                                      HAMBRECHT & QUIST CALIFORNIA

                                                      By: /s/ ROBERT N. SAVOIE
                                                         -----------------------------------------

                                                      HAMBRECHT & QUIST EMPLOYEE VENTURE
                                                      FUND, L.P. II

                                                      By: /s/ ROBERT N. SAVOIE
                                                         -----------------------------------------

                                                      ACCESS TECHNOLOGY PARTNERS, L.P.

                                                      By: /s/ ROBERT N. SAVOIE
                                                         -----------------------------------------

                                                      ACCESS TECHNOLOGY PARTNERS BROKERS FUND, L.P.

                                                      By: /s/ ROBERT N. SAVOIE
                                                         -----------------------------------------
</TABLE>

                  Series E Preferred Stock Purchase Agreement
<PAGE>   25

                           SUMITOMO CORPORATION OF AMERICA
                           By:  /s/ KOTARO NAKATA
                             -----------------------------------------
                               Kotaro Nakata, Vice President, Investment
                               Management

                           MOHR, DAVIDOW VENTURES IV, L.P.
                           By:  Fourth MDV Partners, L.L.C.,
                           General Partner

                           By:  /s/ NANCY SCHOENDORF
                             -----------------------------------------
                               Member

                          MDV IV ENTREPRENEURS' NETWORK FUND, L.P.
                          By:  Fourth MDV Partners, L.L.C.,
                               General Partner

                          By:  /s/ NANCY SCHOENDORF
                             -----------------------------------------
                               Member

                          SEQUEL LIMITED PARTNERSHIP
                          By:  Sequel Venture Partners, L.L.C.,
                               General Partner

                          By:  /s/ THOMAS G. WASHING
                             -----------------------------------------
                               Manager

                          SEQUEL EURO LIMITED PARTNERSHIP
                          By:  Sequel Venture Partners, L.L.C.,
                               General Partner

                          By:  /s/ THOMAS G. WASHING
                             -----------------------------------------
                               Manager

                          LIBERTY VENTURES I, L.P.
                          By:  Liberty Ventures, Inc.
                               Managing General Partner

                          By:  /s/ KAREN GRIFFITH GRYGA
                             -----------------------------------------
                               Vice President

                          TRINITY VENTURES V, L.P.,
                          A CALIFORNIA LIMITED PARTNERSHIP
                          By:  Trinity TVL Partners V, L.P.,
                               A California Limited Partnership
                               Its General Partner

                          By:  /s/ LARRY ORR
                             -----------------------------------------
                               General Partner

                  Series E Preferred Stock Purchase Agreement
<PAGE>   26

                                     TRINITY V SIDE-BY-SIDE FUND, L.P.,
                                     A CALIFORNIA LIMITED PARTNERSHIP
                                     By:  Trinity TVL Partners V, L.P.,
                                          A California Limited Partnership
                                          Its General Partner

                                     By: /s/ LARRY ORR
                                       -----------------------------------------
                                          General Partner

                  Series E Preferred Stock Purchase Agreement

<PAGE>   27

                           REQUISITE TECHNOLOGY, INC.

                                  EXHIBIT A TO
                   SERIES E PREFERRED STOCK PURCHASE AGREEMENT

                             SCHEDULE OF PURCHASERS

<TABLE>
<CAPTION>
NAME AND ADDRESS                                        SERIES E STOCK              AGGREGATE PURCHASE PRICE
----------------                                        --------------              ------------------------
<S>                                                     <C>                         <C>
Spinnaker Clipper Fund, L.P.                                     7,413              $              63,010.50
1875 South Grant Street
Suite 600
San Mateo, CA  94402

Spinnaker Crossover Institutional Fund, L.P.                 1,152,896                          9,799,616.00
1875 South Grant Street
Suite 600
San Mateo, CA  94402

Spinnaker Crossover Fund, L.P.                                  16,162                            137,377.00
1875 South Grant Street
Suite 600
San Mateo, CA  94402

Covestco-Medeura, LLC                                          647,059                          5,500,001.50
C/O Jura Trust
Mitteldorf 1
Vaduz, Liechtenstein, FL  9490
Attn.:  Albin A. Johann

With copies of notices to:

   Dr. Richard J. Haas Partners
   Dukes Court
   32 Duke Street St. James's
   London SW1Y 6DF
   England
   Attn:  Robert Haas and Michael Russell

   Barnard & Co., L.L.C.
   590 Madison Avenue, 37th Floor
   New York, NY  10022
   Attn:  Joel Koblentz
</TABLE>

                                              A-1

<PAGE>   28

<TABLE>
<CAPTION>
NAME AND ADDRESS                                        SERIES E STOCK              AGGREGATE PURCHASE PRICE
----------------                                        --------------              ------------------------
<S>                                                     <C>                         <C>
H&Q Requisite Technology Investors, L.P.                        34,588                            293,998.00
One Bush Street, 12th Floor
San Francisco, CA  94104
Attn.:  Isaac Ruiz

Hambrecht & Quist California                                    20,588                            174,998.00
One Bush Street, 12th Floor
San Francisco, CA  94104
Attn.:  Isaac Ruiz

Hambrecht & Quist Employee Venture Fund, L.P. II                20,588                            174,998.00
One Bush Street, 12th Floor
San Francisco, CA  94104
Attn.:  Isaac Ruiz

Access Technology Partners, L.P.                               329,412                          2,800,002.00
One Bush Street, 12th Floor
San Francisco, CA  94104
Attn.:  Isaac Ruiz

Access Technology Partners                                       6,589                             56,006.50
    Brokers Fund, L.P.
One Bush Street, 12th Floor
San Francisco, CA  94104
Attn.:  Isaac Ruiz

Sumitomo Corporation of America                                117,647                            999,999.50
600 Third Avenue
New York, New York 10016

Mohr, Davidow Ventures IV, L.P.                                244,984                          2,082,364.00
3000 Sand Hill Road
Building 1, Suite 240
Menlo Park, CA  94025
Attn:  Nancy J. Schoendorf

MDV IV Entrepreneurs' Network                                   11,216                             95,336.00
   Fund, L.P.
3000 Sand Hill Road
Building 1, Suite 240
Menlo Park, CA  94025
Attn:  Nancy J. Schoendorf
</TABLE>

                                      A-2
<PAGE>   29

<TABLE>
<CAPTION>
NAME AND ADDRESS                                        SERIES E STOCK              AGGREGATE PURCHASE PRICE
----------------                                        --------------              ------------------------
<S>                                                     <C>                         <C>
Sequel Limited Partnership                                      81,934                            696,439.00
4430 Arapahoe Avenue, Suite 220
Boulder, CO  80303
Attn:  Thomas G. Washing

Sequel Euro Limited Partnership                                 89,266                            758,761.00
4430 Arapahoe Avenue, Suite 220
Boulder, CO  80303
Attn:  Thomas G. Washing

Trinity Ventures V, L.P.                                       108,630                            923,355.00
3000 Sand Hill Road
Bldg. 1, Suite 240
Menlo Park, CA 94025
Attn:  Noel Fenton

Trinity V Side-by-Side Fund, L.P.                                6,252                             53,142.00
3000 Sand Hill Road
Bldg. 1, Suite 240
Menlo Park, CA 94025
Attn:  Noel Fenton

Liberty Ventures I, L.P.                                        45,953                            390,600.50
200 South Broad Street
8th Floor
Philadelphia, PA  19102
Attn:  Karen Griffith-Gryga

                                                        --------------              ------------------------
TOTAL                                                        2,941,177              $          25,000,004.50
</TABLE>

                                      A-3

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