Addon to mitmproxy: https://docs.mitmproxy.org/stable/addons/overview/

Looks like it's implemented that way already?

https://github.com/jmuncor/sherlock/blob/fb76605fabbda351828...

What would you think of simply using an http relay for all providers? Would that make you feel better secutity wise? also could extend the tool to change the context you are sending and make it more granular to what you want/need...