@tchambers @smallcircles Got it. FWIW, I tried doing a Docker install of XWiki with the #ActivityPub extension and have run into several bugs that prevent Mastodon from being able to follow my XWiki user. They use a nonstandard webfinger endpoint, but I worked around that. Another AP extension issue seems to be related to my reverse proxy. The JSON-LD actor data is missing the security context and mixes public and LAN domains in the URLs.