Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2022	May 13, 2022
Entity Listings [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Document Transition Report	false
Entity Registrant Name	Mercury Ecommerce Acquisition Corp
Entity Central Index Key	0001849902
Entity Incorporation, State or Country Code	DE
Entity File Number	001-40679
Entity Tax Identification Number	86-2365445
Entity Address, Address Line One	3737 Buffalo Speedway
Entity Address, Address Line Two	Suite 1750
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77098
City Area Code	713
Local Phone Number	715-6820
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	true
Units [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Units, each consisting of one share of Class A common stock and one-half of one warrant
Trading Symbol	MEACU
Security Exchange Name	NASDAQ
Class A Common Stock [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Class A common stock, par value $0.0001 per share
Trading Symbol	MEAC
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		18,041,500
Warrants [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 per share
Trading Symbol	MEACW
Security Exchange Name	NASDAQ
Class B Common Stock [Member]
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		4,510,375