[dolmen]

So you might just need an anonymizing relay to the Google proxy.

The GOPROXY protocol is quite small to allow to implement such a relay: https://go.dev/ref/mod#goproxy-protocol

[dolmen]

Also using a generic http_proxy that does the relay you need might just be enough as many solutions exist in that space.

https://stackoverflow.com/questions/10383299/how-do-i-config...