Exhibit 10.5


 


SEAPORT GLOBAL ACQUISITION II CORP.

360 Madison Avenue, 20th Floor

New York, NY 10017


 


November 17, 2021


 


Seaport Global SPAC II, LLC

360 Madison Avenue, 20th Floor

New York, NY 10017


 


Re: Administrative Support Agreement


 


Ladies and Gentlemen:


 


This letter agreement by and
between Seaport Global Acquisition II Corp. (the “Company”) and Seaport Global SPAC II, LLC (“Sponsor”), dated
as of the date hereof, will confirm our agreement that, commencing on the date the securities of the Company are first listed on the Nasdaq
Global Market (the “Listing Date”), pursuant to a Registration Statement on Form S-1 and prospectus filed with the U.S. Securities
and Exchange Commission (File No. 333-260623) (the “Registration Statement”) and continuing until the earlier of the
consummation by the Company of an initial business combination or the Company’s liquidation (in each case as described in the Registration
Statement) (such earlier date hereinafter referred to as the “Termination Date”):


 


(i)            Sponsor
shall make available, or cause to be made available, to the Company, at 360 Madison Avenue, 20th Floor, New York, NY 10017 (or
any successor location of Sponsor), certain office space, utilities and secretarial and administrative support as may be reasonably required
by the Company. In exchange therefor, the Company shall pay Sponsor the sum of $10,000 per month beginning on the Listing Date and
continuing monthly thereafter until the Termination Date; and


 


(ii)            Sponsor
hereby irrevocably waives any and all right, title, interest, causes of action and claims of any kind as a result of, or arising out of,
this letter agreement (each, a “Claim”) in or to, and any and all right to seek payment of any amounts due to it out of the
trust account established for the benefit of the public stockholders of the Company and into which substantially all of the proceeds of
the Company’s initial public offering will be deposited (the “Trust Account”) as a result of, or arising out of, this
letter agreement, and hereby irrevocably waives any Claim it may have in the future, which Claim would reduce, encumber or otherwise adversely
affect the Trust Account or any monies or other assets in the Trust Account, and further agrees not to seek recourse, reimbursement, payment
or satisfaction of any Claim against the Trust Account or any monies or other assets in the Trust Account for any reason whatsoever.


 


This letter agreement constitutes
the entire agreement and understanding of the parties hereto in respect of its subject matter and supersedes all prior understandings,
agreements, or representations by or among the parties hereto, written or oral, to the extent they relate in any way to the subject matter
hereof or the transactions contemplated hereby.


 


This letter agreement may
not be amended, modified or waived as to any particular provision, except by a written instrument executed by the parties hereto.


 


No party hereto may assign
either this letter agreement or any of its rights, interests, or obligations hereunder without the prior written approval of the other
party. Any purported assignment in violation of this paragraph shall be void and ineffectual and shall not operate to transfer or assign
any interest or title to the purported assignee.


 


This letter agreement constitutes
the entire relationship of the parties hereto, and any litigation between the parties (whether grounded in contract, tort, statute, law
or equity) shall be governed by, construed in accordance with, and interpreted pursuant to the laws of the State of New York, without
giving effect to its choice of law principles.


 


[Signature Page Follows]


 






     


     


    







 


	 	Very truly yours,
	 	 
	 	SEAPORT GLOBAL ACQUISITION II CORP.




 


		By:	/s/ Stephen Smith
	 	 	Name: Stephen Smith
	 	 	Title: Chief Executive Officer


 


AGREED TO AND ACCEPTED BY:


 


SEAPORT GLOBAL SPAC II, LLC


 


	By:	/s/ Stephen Smith	 
	 	Name: Stephen Smith	 
	 	Title: CEO of Managing Member	 


  


[Signature Page to Administrative Support Agreement]