One sign-in, every proc.io project
This is the shared auth surface for proc.io projects. Sign in once — with a
passkey or a 12-word account key — and every *.proc.io app sees
the same session. No passwords, no email, nothing to leak.
For project authors
Send users here with a return_to back to your app
(any https URL on proc.io or a subdomain):
https://auth.proc.io/login?return_to=https://yourapp.proc.io/…
Validate sessions by forwarding the Cookie header to
authgravity.proc.io/v1/whoami. Details in /llms.txt.