Web GUI based API Executor Application like PostMan -- 2

Want to create a Web based GUI on which one can post request ( receive response also on +ve/-ve), do get call, do patch call, do delete call, do purge, head, options, do put call in a web based GUI application. The URL should be dynamic and can be coming from different servers ( read from backend server like, consul or yaml files), and as postman once we send suppose a URL to fetch the password, it can generate the response and save to other calls to do the REST/SOAP calls. Code Language : java, springboot,MS(for different API services), URL change implementation for picking either with server & manual if not found, also, have structure to update the certificates in case some server requires certificate to access the password token.