A few years ago I put together: https://github.com/nickjj/webserver https://github.com/nickjj/webserver It's a self hosted zero dependency / single file Python

A few years ago I put together: https://github.com/nickjj/webserver https://github.com/nickjj/webserver It's a self hosted zero dependency / single file Python based echo server. You run `webserver 8000` and then you can make HTTP requests to `localhost:8000` with whatever URL path, headers and payload you want and it'll echo it back.