> your server needs to be online and ready to accept effectively a webhook from them. The obvious answer there is "ActivityPub over SMTP". There is literally

> your server needs to be online and ready to accept effectively a webhook from them. The obvious answer there is "ActivityPub over SMTP". There is literally nothing that could go wrong![1] (Basically a service which holds "ActivityPub postboxes" which collect events when you're offline and you pick them up in a batch when you're back online. The XMPP people already solved this one, IIRC.) [1] Ok, there might be -some- problems.