<PAGE>

                                                                   EXHIBIT 10.57

NEITHER THIS WARRANT NOR THE SECURITIES ISSUABLE UPON EXERCISE HEREOF HAVE BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "1933 ACT") OR THE
SECURITIES LAWS OF ANY STATE; THEREFORE, THIS WARRANT AND THE SECURITIES
ISSUABLE UPON EXERCISE HEREOF MAY NOT BE SOLD OR TRANSFERRED EXCEPT UPON SUCH
REGISTRATION OR UPON DELIVERY TO THE CORPORATION OF AN OPINION OF COUNSEL
SATISFACTORY TO THE CORPORATION THAT REGISTRATION IS NOT REQUIRED FOR SUCH SALE
OR TRANSFER.

                       WARRANT TO PURCHASE COMMON STOCK

                                      OF

               APPLIED VOICE RECOGNITION, INC., d/b/a e-DOCS.net

                         VOID AFTER DECEMBER 31, 2000

          This certifies that YANIV DAGAN ("Dagan"), is entitled to purchase
twelve thousand five hundred (12,500) shares (the "Shares") of fully paid and
nonassessable shares of Common Stock, $0.001 par value (the "Common Stock"), of
Applied Voice Recognition, Inc., a Delaware corporation doing business as e-
DOCS.net (the "Company"), at a purchase price per share equal to the lower of
(i) $1.75, or (ii) the average closing price of the common stock for the thirty
(30) day period immediately preceding the Effective Date of this Warrant.  The
Shares may be purchased at any time, in whole or in part, until the expiration
of this Warrant.

          The purchase price per share of Common Stock from time to time in
effect under this Warrant, and the number and character of shares covered
hereby, shall be subject to adjustments from time to time in certain instances
as follows, and the term "Exercise Price" shall mean the price per share
originally set forth in this Warrant or any price resulting from adjustments
pursuant to the terms hereof. The shares of Common Stock deliverable upon such
exercise, and as adjusted from time to time, are hereinafter sometimes referred
to as "Warrant Stock".  The term "Holder" shall refer to Dagan or any person or
entity holding this Warrant in accordance with the terms hereof.

     (a)  Exercise of Warrant.  Subject to and in accordance with the provisions
          -------------------
hereof, this Warrant may be exercised in whole or in part after the date
appearing above the signature of the Company below (the "Effective Date"), but
not later than 5:00 p.m., Houston time, on December 31, 2000; or if such day is
a day on which United States postal offices are closed, then on the next
succeeding day which shall not be such a day, by presentation and surrender
hereof to the Company or at the office of its stock transfer agent, if any, with
the Purchase Form annexed hereto duly executed and accompanied by payment of the
Exercise Price for the number of shares specified in such form, together with
all applicable federal and state taxes.  If this Warrant should be exercised in
part only, the Company shall, upon surrender of this Warrant for cancellation,
execute and deliver a new Warrant evidencing the right of the Holder to purchase
the balance of the shares purchasable hereunder. Upon receipt by the Company of

                                      -1-
<PAGE>

this Warrant at the office or agency of the Company, in proper form for exercise
and pursuant to compliance herewith, together with payment of the Exercise
Price, the Holder shall be deemed to be the holder of record, for all purposes,
of the shares of Common Stock issuable upon such exercise, notwithstanding that
the stock transfer books of the Company shall then be closed or that
certificates representing such shares of Common Stock shall not then be actually
delivered to the Holder. Upon receipt of the required deliveries, the Company
shall, as promptly as practicable, and in any event within ten (10) days
thereafter, cause to be issued and delivered to the Holder hereof or the
transferee designated in the Purchase Form a certificate or certificates
representing the aggregate number of full shares of Common Stock issuable upon
such exercise registered in the name of the Holder hereof, or the name of the
transferee so designated, as the case may be.

     (b)  No Impairment.  The Company hereby agrees that (i) at all times there
          -------------
shall be reserved for issuance and delivery upon exercise of this Warrant such
number of shares of its Common Stock as shall be required for issuance and
delivery upon exercise of this Warrant, and (ii) it will take all action as may
be necessary in order that all shares of stock as may be issued pursuant to this
Warrant shall, upon issuance, be duly and validly issued, fully paid, non-
assessable and free from all taxes, liens and charges with respect to the
issuance thereof.

     (c)  Fractional Shares.  No fractional shares or scrip representing
          -----------------
fractional shares shall be issued upon the exercise of this Warrant.  With
respect to any fraction of a share called for upon any exercise hereof, after
payment of the Exercise Price for such fractional share by the Holder, the
Company shall round the number of shares issued upon the exercise of this
Warrant to the next highest full share.

     (d)  Assignment of Warrant or Warrant Stock or Loss of Warrant.
          ---------------------------------------------------------

          (1)  This Warrant may not be sold, transferred, assigned or
     hypothecated at any time after its execution and delivery, except upon
     compliance with the requirements of this Warrant and any applicable state
     or federal securities laws.

          (2)  Any sale, assignment, transfer or hypothecation of this Warrant
     shall be made by surrender of this Warrant to the Company or at the office
     of its stock transfer agent, if any, with the Assignment Form annexed
     hereto duly executed and accompanied with funds sufficient to pay any
     transfer tax; whereupon, the Company shall, after first receiving such
     evidence as the Company may reasonably require as to compliance with this
     Warrant, without charge, execute and deliver a new Warrant in the name of
     the assignee named in such instrument of assignment and this Warrant shall
     promptly be canceled.

          (3)  The term "Warrant" as used herein includes any Warrant issued in
     substitution for or replacement of this Warrant.  Upon receipt by the
     Company of evidence of the loss, theft, destruction or mutilation of this
     Warrant, and upon surrender and cancellation of this Warrant, if mutilated,
     the Company will at its expense execute

                                      -2-
<PAGE>

     and deliver a new Warrant of like tenor and date. When authorizing the
     execution and delivery of a new Warrant to replace a Warrant lost, stolen
     or destroyed, the Board of Directors of the Company may, in its sole
     discretion and as a condition precedent thereto, require the Holder to
     deliver an affidavit in a form satisfactory to the Board of Directors of
     the Company and to indemnify the Company against any claim that may be made
     against the Company with respect to such lost, stolen or destroyed Warrant.

     (e)  Anti-Dilution and Adjustment Provisions.  The purchase price per share
          ---------------------------------------
of Common Stock from time to time in effect under this Warrant, and the number
and character of shares covered hereby, shall be subject to adjustments from
time to time in certain instances as follows, and the term "Exercise Price"
shall mean the price per share originally set forth in this Warrant or any price
resulting from adjustments pursuant to the terms hereof.

          (1)  In case the Company shall subdivide its outstanding shares of
     Common Stock into a greater number of shares or shall issue in exchange for
     its outstanding shares of Common Stock a greater number of shares of Common
     Stock, then in each such case from and after the record date for such
     subdivision or exchange, the number of shares of Common Stock covered by
     this Warrant shall be increased in proportion to such increase in the
     number of outstanding shares of Common Stock and the Exercise Price then in
     effect shall be correspondingly decreased; and in the case the Company
     shall reduce the number of shares of its Common Stock by a combination of
     shares or shall issue in exchange for its outstanding shares of Common
     Stock a lesser number of shares of Common Stock, then in each such case
     from and after the record date for such combination or exchange, the number
     of shares of Common Stock covered by this Warrant shall be decreased in
     proportion to such reduction in the number of outstanding shares of Common
     Stock, and the then prevailing Exercise Price shall be correspondingly
     increased.

          (2)  In case the Company shall declare and pay a dividend upon its
     Common Stock payable in Common Stock, then in each such case from and after
     the record date for determining the stockholders entitled to receive such
     dividend, the number of shares of Common Stock covered by this Warrant
     shall be increased in proportion to the increase in the number of
     outstanding shares of Common Stock through such stock dividend, and the
     then prevailing Exercise Price shall be correspondingly decreased.

          (3)  In case of any reclassification or change of outstanding shares
     of Common Stock (other than as a result of a subdivision, combination or
     stock dividend) or in case of the consolidation or merger of the Company
     with or into any other corporation (other than a merger in which the
     Company is the continuing corporation and which does not result in any
     reclassification or change in its outstanding shares of Common Stock), or
     in case of any sale by the Company of all or substantially all of its
     assets to another corporation, the Holder shall have the right thereafter
     to receive upon exercise of this Warrant the amount and kind of shares of
     capital stock and other securities and property entitled to be received
     upon such reclassification, change, consolidation, merger or sale

                                      -3-
<PAGE>

     by a holder of the number of shares of Common Stock of the Company covered
     by this Warrant at the then prevailing Exercise Price, subject to
     subsequent adjustments as provided herein.

     (f)  Notices to Holder.  So long as this Warrant shall be outstanding and
          -----------------
unexercised (i) if the Company shall pay any dividend or make any distribution
upon the Common Stock, or (ii) if any capital reorganization of the Company,
reclassification of the capital stock of the Company, consolidation or merger of
the Company with or into another corporation, sale, lease or transfer of all or
substantially all of the property and assets of the Company to another
corporation, or voluntary or involuntary dissolution, liquidation or winding up
of the Company shall be effected, then, in any such case, the Company shall
cause to be delivered to the Holder, at least ten (10) days prior to the date
specified in (x) and at least thirty (30) days prior to the date specified in
(y) below, as the case may be, a notice containing a brief description of the
proposed action and stating the date on which (x) a record is to be taken for
the purpose of such dividend, distribution or rights, or (y) such
reclassification reorganization, consolidation, merger, conveyance, lease,
dissolution, liquidation or winding up is to take place and at least twenty (20)
days prior notice as to the date, if any is to be fixed, as of which the holders
of Common Stock of record shall be entitled to exchange their shares of Common
Stock for securities or other property deliverable upon such reclassification,
reorganization, consolidation, merger, conveyance, dissolution, liquidation, or
winding up.

     (g)  Transfer to Comply with the Securities Act.
          ------------------------------------------

          (1)  This Warrant or the Warrant Stock or any other security issued or
     issuable upon exercise of this Warrant may not be offered or sold except in
     conformity with the Securities Act, and then only against receipt of an
     agreement of such person to whom such offer of sale is made to comply with
     the provisions of this Section (g) with respect to any resale or other
     disposition of such securities.

          (2)  The Company may cause the legends set forth at the top of the
     first page hereof to be set forth on each Warrant and the following legends
     to be set forth on each certificate representing Warrant Stock, unless
     counsel for the Company is of the opinion as to any such certificate that
     such legend is unnecessary:

          THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN
          REGISTERED UNDER THE SECURITIES ACT OF 1933 OR THE OR THE
          SECURITIES LAWS OF ANY STATE. SUCH SECURITIES MAY NOT BE SOLD
          OR TRANSFERRED EXCEPT UPON SUCH REGISTRATION OR UPON DELIVERY
          TO THE CORPORATION OF AN OPINION OF COUNSEL SATISFACTORY TO THE
          CORPORATION THAT REGISTRATION IS NOT REQUIRED FOR SUCH SALE OR
          TRANSFER.

                                      -4-
<PAGE>

     (h)  Applicable Law.  This Warrant shall be governed by, and construed in
          --------------
accordance with, the laws of the State of Delaware.

     (i)  Notice.  Any notices or certificates by the Company to the Holder and
          ------
by the Holder to the Company shall be deemed delivered if in writing and
delivered personally or five (5) days after being sent by certified mail or
registered mail, return receipt requested, to the Holder. For purposes hereof,
the address of the Holder shall be 473 Golden Isle Drive #201, Hollendale,
Florida 33009, Attention: Mr. Yaniv Dagan, and the address of the Company shall
be 1717 St. James Place, Suite 242, Houston, Texas 77056 Attention: Chief
Financial Officer; provided, however, either address may be changed by notice
given in accordance herewith.

     (j)  Nonwaiver.  No course of dealing or any delay or failure to exercise
          ---------
any right, power or remedy hereunder on the part of the Holder hereof shall
operate as a waiver of or otherwise prejudice such Holder's rights, powers or
remedies.

     (k)  Holder Not a Stockholder.  Prior to the exercise of this Warrant as
          ------------------------
hereinbefore provided, the Holder hereof shall not, by virtue of its ownership
of this Warrant, except as specifically provided herein, be entitled to any of
the rights of a holder of Common Stock of the Company including, without
limitation, the right as a stockholder to (a) vote on or consent to any proposed
action of the Company or (b) receive notice of or attend any meetings of
stockholders of the Company or notice of any other proceedings of the Company.

     (l)  Successors and Assigns.  This Warrant and the rights evidenced hereby
          ----------------------
shall inure to the benefit of and be binding upon the successors and assigns of
the Company, the Holder hereof and the Holder of the shares of Common Stock
issued upon the exercise hereof, and shall be enforceable by any such Holder.


                    [REST OF PAGE INTENTIONALLY LEFT BLANK]

                                      -5-
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          IN WITNESS WHEREOF, the Company has caused this Warrant to be executed
effective as of May 4, 2000.

                                 APPLIED VOICE RECOGNITION, INC.,
                                 d/b/a e-DOCS.net



                                 By: /s/ Timothy J. Connolly
                                    -----------------------------------
                                      Timothy J. Connolly, President



                                 Signature Page
                                       To
                        Warrant to Purchase Common Stock
                                 (Yaniv Dagan)

                                      -6-
<PAGE>

                                 PURCHASE FORM


     The undersigned, the Holder of the within Warrant, hereby irrevocably
elects to exercise the purchase rights represented by said Warrant for, and to
purchase thereunder, ________ shares of Common Stock, $0.001 par value per
share, of Applied Voice Recognition, Inc., d/b/a e-DOCS.net and herewith makes
payment of $___________ in cash therefor and requests that the certificates for
such shares be issued in the name of __________________________________ and
delivered to _________________________________________________________________,
whose address is _____________________________________________________ and, if
such shares shall not be all of the shares purchasable hereunder, that a new
Warrant of like tenor for the balance of the shares purchasable hereunder be
delivered to the undersigned.


Dated:________________           ______________________________________
                                 Name:_________________________________
                                 Title:________________________________

                                 Address:_______________________________
                                         _______________________________
                                         _______________________________

                                 Social Security
                                 or Tax I.D. No._________________________
<PAGE>

                                 ASSIGNMENT IN FULL


     FOR VALUE RECEIVED, ___________________________________ hereby sells,
assigns and transfers unto _______________________________ the within Warrant
and all rights evidenced thereby and does irrevocably constitute and appoint
_________________________, attorney, to transfer the said Warrant on the books
of the within named Company.


Dated:____________              ________________________________________
                                ________________________________________

                                 Address:_______________________________
                                         _______________________________
                                         _______________________________

                                 Social Security
                                 or Tax I.D. No.________________________
<PAGE>

                                 PARTIAL ASSIGNMENT


     FOR VALUE RECEIVED, ___________________________________ hereby sells,
assigns and transfers unto ________________________________ a portion of the
within Warrant and the rights evidenced thereby, to wit: the right to purchase
                                                 -- ---
______ shares of Common Stock of _____________________________________________
and does irrevocably constitute and appoint
____________________________________, attorney, to transfer to such extent the
said Warrant on the books of the within named Corporation.


Dated:________________           _______________________________________
                                 _______________________________________

                                 Address:_______________________________
                                         _______________________________
                                         _______________________________

                                 Social Security
                                 or Tax I.D. No.________________________