It’s a free and open source interactive HTTPS proxySee the tool
Description
mitmproxy is your swiss-army knife for debugging, testing, privacy measurements, and penetration testing. It can be used to intercept, inspect, modify and replay web traffic such as HTTP/1, HTTP/2, WebSockets, or any other SSL/TLS-protected protocols.
More Resources & Tools in API
Thunder Client is a lightweight Rest API Client Extension for Visual Studio Code
Snapshot-based stub/mocking of APIs.
GUI client for gRPC/gRPC-Web