No, microformats: https://microformats.org/wiki/rel-me https://microformats.org/wiki/rel-me They also submitted a patch to Mastodon that had it check the first

No, microformats: https://microformats.org/wiki/rel-me https://microformats.org/wiki/rel-me They also submitted a patch to Mastodon that had it check the first megabyte of a page (where this would be) rather than give up on pages over 1MB.