Sign-in challenge

This page is being written

It describes what the page will cover. Full instructions follow soon.

What this check verifies. Checks that an unauthenticated request gets a 401 response whose WWW-Authenticate: Bearer header carries resource_metadata, so agents can find where to sign in.

This page will explain what a failing result means, what ChatGPT and Claude do in that case, and how to fix your server or authorization server.