title: Testing Server for JSON-RPC
body: <p>Is there a simple online testing server (similar to Postman-echo.com) that I can use for JSON-RPC commands from Postman or for any other simple scripts that I might be writing?</p>
  <p>On GitHub, I see lots of <a href="https://github.com/public-apis/public-apis" rel="nofollow noreferrer">public APIs on GitHub</a> (many that don't even need keys), but I unfortunately don't see any for JSON-RCP that I could use.</p>
  <p>I also stumbled across this <a href="https://gurujsonrpc.appspot.com/" rel="nofollow noreferrer">Guru JSON app</a>, but it seems to only let me send JSON from the website, not from other apps like Postman.</p>