Exhibit 10.5

   

  Execution
          Version

   

  MERCURY
        ECOMMERCE ACQUISITION CORP.

  3737
      Buffalo Speedway, Suite 1750

  Houston,
      Texas 77098

   

  July
      27, 2021

   

  Mercury
      Sponsor Group I LLC

  3737
      Buffalo Speedway, Suite 1750

  Houston,
      Texas 77098

   

  Re:       Administrative
        Support Agreement

   

  Ladies
      and Gentlemen:

   

  This
      letter will confirm our agreement that, commencing on the effective date (the “Effective Date”) of the
      registration statement (the “Registration Statement”) for the initial public offering (the “IPO”)
      of the securities of Mercury Ecommerce Acquisition Corp. (the “Company”) and continuing until the earlier
      of (i) the consummation by the Company of an initial business combination and (ii) the Company’s liquidation (in each case
      as described in the Registration Statement) (such earlier date hereinafter referred to as the “Termination Date”),
      Mercury Sponsor Group I LLC (the “Sponsor”) shall take steps directly or indirectly to make available
      to the Company certain office space, secretarial and administrative services as may be required by the Company from time to time,
      situated at 3737 Buffalo Speedway, Suite 1750, Houston, Texas 77098 (or any successor location). In exchange therefore, the Company
      shall pay the Sponsor a sum of $10,000 per month on the Effective Date and continuing monthly thereafter until the Termination
      Date. The Sponsor hereby agrees that it does not have any right, title, interest or claim of any kind (a “Claim”)
      in or to any monies that may be set aside in a trust account (the “Trust Account”) that may be established
      upon the consummation of the IPO and hereby irrevocably waives any Claim it may have in the future as a result of, or arising
      out of, any negotiations, contracts or agreements with the Company and will not seek recourse against 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.

   

  The
      parties may assign this letter agreement and any of their rights, interests, or obligations hereunder at any time upon five days’
      notice to the other party.

   

  This
      letter agreement 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 laws principles.

   

  
     

    
      

    

  

   

  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 agreement. Only one such counterpart signed by the party against whom
      enforceability is sought needs to be produced to evidence the existence of this letter agreement.

   

  (Signature
        Page Follows)

   

  
     

    
      

    

  

   

  	 	Very truly yours,
	 	 
	 	MERCURY ECOMMERCE ACQUISITION CORP.
	 	 
	 	By:	/s/ R. Andrew White
	 	 	R. Andrew White
	 	 	President and Chief Executive Officer


   

  	Acknowledged and Agreed:	 
	 	 
	MERCURY SPONSOR GROUP I LLC	 
	 	 
	By:	/s/ R. Andrew White	 
	 	R. Andrew White	 
	 	Authorized Person	 
	 	 	 


   

  

  Signature
        Page to Administrative Support Agreement