@feditips yeah just looked a second into it and AFAIK there is no API method for this yet. (Or I haven't seen it). So I guess creating an API method that fetches the last 1000 posts or so would make sense. Rate limiting on this would also make sense, otherwise it could be used as an attack. Have to tinker around a bit.
Anyways fetching ALL 100k posts (if someone posted that much) wouldn't make sense. Should still be limited to some kind