Reposted 1304.

Understanding ActivityPub Part 1: Protocol Fundamentals

seb.jambor.dev/posts/understanding-activitypub

This article is part of the series Understanding ActivityPub, which takes a look at the ActivityPub protocol through the lens of real-world examples. The protocol exchanges are taken from ActivityPub.Academy, a modified Mastodon instance that shows ActivityPub messages in real time (see the announcement post).