Interesting, I didn't know about that one, thanks for the suggestion. The only one I know is the Thunder Client but the EchoAPI seems to be very good, I like to use a separate client on the desktop like the Rapid API. I'll leave the links below for anyone who sees this comment and wants to know more:
EchoAPI: marketplace.visualstudio.com/items
Thunder Client: marketplace.visualstudio.com/items