| Cover | Feb. 20, 2023 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 20, 2023 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 001-40076 |
| Entity Registrant Name | FINSERV ACQUISITION CORP. II |
| Entity Central Index Key | 0001834336 |
| Entity Tax Identification Number | 85-4030806 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | c/o Ellenoff Grossman & Schole LLP |
| Entity Address, Address Line Two | 1345 Avenue of the Americas |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10105 |
| City Area Code | (929) |
| Local Phone Number | 529-7125 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Units, each consisting of one share of Class A Common Stock and one-quarter of one Redeemable Warrant | |
| Title of 12(b) Security | Units, each consisting of one share of Class A Common Stock and one-quarter of one Redeemable Warrant |
| Trading Symbol | FSRXU |
| Security Exchange Name | NASDAQ |
| Class A Common Stock, par value $0.0001 per share | |
| Title of 12(b) Security | Class A Common Stock, par value $0.0001 per share |
| Trading Symbol | FSRX |
| Security Exchange Name | NASDAQ |
| Warrants, each whole warrant exercisable for one share of Class A Common Stock for $11.50 per share | |
| Title of 12(b) Security | Warrants, each whole warrant exercisable for one share of Class A Common Stock for $11.50 per share |
| Trading Symbol | FSRXW |
| Security Exchange Name | NASDAQ |
