I’ve been running this with workloads accessing Anthropic, GitHub, Gemini, and AWS & CF R2 APIs for a while now, and have not ran into issues. I’m sure there’s an API out there that won’t work out of the box but I’m positive that support could be added.

Another thing I did was to allow configuring which hosts each credential is scoped to. Replacement /resigning doesn’t happen unless host matches. That way it is not possible to leak keys by making requests to malicious hosts.

The last note about configuring hosts to credentials is an excellent idea, and one I did not think to do. Currently I'm just doing a replace on any that matches in the request. This adds an extra layer of security to it. Much appreciated.