A good alternative to writing your own echo server and debugging requests one route at a time is requestbin, which will gladly take any requests you throw at it

A good alternative to writing your own echo server and debugging requests one route at a time is requestbin, which will gladly take any requests you throw at it, log them, and optionally return a response of your choice. Lots of different implementations and hosts: https://duckduckgo.com/?q=requestbin https://duckduckgo.com/?q=requestbin