alt Hacker NewsI'll admit it's a bit charged, but I'm frustrated with bad faith takedowns of ATProto/Bluesky, while Mastodon (and it is Mastodon, not ActivityPub) solves almost none of the actual problems. I tried implementing my own ActivityPub server and the spec is so hilariously lacking that it's understandable that everyone just uses the Mastodon API instead.
ActivityPub isn't actually the spec of Mastodon. Treat claims of "Mastodon is ActivityPub" the same as you treat claims of "Bluesky is decentralised."
Just expose the same interface Mastodon does and you'll be fine. Noting that almost nothing cares about the exact URLs you use, except for webfinger, but does care about the domain being the same as the right side of the @ sign.