Exhibit 10.8


 





FirstMark Acquisition Corp. II 


100 5th Ave, 3rd Floor





New York, NY 10011


 


[  ], 2021


 


FirstMark Capital LLC


100 5th Ave, 3rd Floor





New York, NY 10011





 


Re: Administrative Services Agreement


 


Gentlemen:


 


This letter agreement by and between FirstMark Acquisition Corp.
II, a Delaware corporation (the “Company”), and FirstMark Capital LLC, a Delaware limited liability company
(“FirstMark”), 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 New York Stock Exchange (the “Listing Date”) and continuing
until the earlier of the consummation by the Company of an initial business combination and the Company’s liquidation (in
each case as described in the Registration Statement on Form S-1 (File No. 333-[ ]) filed with the Securities and Exchange Commission)
(such earlier date hereinafter referred to as the “Termination Date”):


 


		1.	FirstMark shall make available to the Company, at 100 5th Ave, 3rd Floor, New York, NY 10011 (or any
successor location or other existing office locations of FirstMark or any of its affiliates), certain office space, administrative
and support services, including compliance services, as may be reasonably requested by the Company. In exchange therefor, the Company
shall pay, on the first day of each month, FirstMark the sum of $10,000 per month commencing on the Listing Date and continuing
monthly thereafter until the Termination Date; and



 


		2.	FirstMark hereby irrevocably waives any and all right, title, interest, causes of action and claims of any kind or nature whatsoever
(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”), and hereby irrevocably
waives any Claim it presently has or may have in the future as a result of, or arising out of, this letter agreement, 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 all 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, provided that FirstMark
may assign this letter agreement to an affiliate without the prior written approval of the Company. 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, 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
and construed in accordance with the laws of the State of New York.


 


This letter agreement may be executed in one or more counterparts,
each of which shall for all purposes be deemed to be an original but all of which together shall constitute one and the same letter
agreement.


 


[Signature page follows]




    2


     


    


	 	Very truly yours,
	 	 	 
	 	FIRSTMARK ACQUISITION CORP. II
	 	 	 
	 	By:	 
	 	 	Name:	Eric Cheung
	 	 	Title:	Secretary







 








	AGREED TO AND ACCEPTED BY:	 
	 	 	 
	FIRSTMARK CAPITAL LLC	 
	 	 	 
	By:	 	 
	 	Name:	Richard Heitzmann	 
	 	Title:	Authorized Signatory	 







 





[Signature Page to Administrative Services Agreement]