Any testing tools available?

I'm trying to implement IndieAuth for https://anderspitman.com/users/anders. I'm returning the indieauth-metadata Link header, but IndieLogin.com is never making a request to the metadata endpoint.

Are there any debugging clients available to help me determine what I'm missing?

No files or tests are named. Start by examining the IndieAuth metadata endpoint and the IndieLogin.com request flow described in the issue; the work would need a clearly defined debugging client or documented testing path, plus a way to verify why the metadata request is not made.

Written by the indexing model from the issue text.