@astrojuanlu Yeah sorry, I misunderstood what you meant. It's possible to run ActivityPub on shared hosting, but I'm not aware of any mature projects. @Edent has a barebones demo server that proves the concept: https://gitlab.com/edent/activitypub-single-php-file

@julian @astrojuanlu
Hello! Mine is a simple PHP file which you can upload via FTP.
Doesn't require a database.

Warning - it is a proof of concept. It works, but it isn't pretty!