We used to use /projects/PROJECT_1/repos/rep_1/attachments to upload attachments to a repository so that we could attach these attachments to comments on a pull request. As of 8.19.12, this endpoint no longer accepts PAT/HTTP Access Tokens and instead returns a 401 and increments the captcha counter for the associated user account.

Please release a public API version of this endpoint for integration. My end users had been integrating it for several reasons:

The files are uploaded to the PR as an attachment for convenient review. I can think of several other ways to make this information available if necessary, but this was very convenient.