Would you consider using http over unix pipe for the client/server protocol?

[tarasglek]

This is what docker uses, eg https://kelcecil.com/curl/2015/12/07/query-unix-socket-with-curl.html

Python supports this too https://gist.github.com/fphammerle/5a23717cceff3e724a512c3ded6e9b53

It's a standard protocol and would allow interfacing with your server easier from other tools.