







Inspired by @pds.dad 's AMA about #atproto over on #Mastodon ... AMA about #ActivityPub and the #Fediverse! No question is too basic! (If questions get beyond my knowledge I'll at least try to point you in the right direction 😃)
Jul 26, 2026 at 3:32 PM
Mastodon creator shares what went wrong with Threads and ponders the future of the fediverse
In a wide-ranging interview with Eugen Rochko, creator of the decentralized social network Mastodon, Rochko shared why Threads federation fell flat, why ActivityPub and ATProto will likely never merge, and what it will take to grow the fediverse.

Developer Documentation for ActivityPub & Fediverse | SocialDocs
The comprehensive developer resource for building with ActivityPub, Mastodon, and the Fediverse. Guides, specs, API reference, and tools.

Interoperability with Mastodon/ActivityPub · bluesky-social atproto · Discussion #1716
What are the current plans from BlueSky (the company) for interoperability with Mastodon/ActivityPub? We currently have two emerging alternatives to X that deserve to be taken seriously: the fedive...
Are there any other guides to Mastodon and the Fediverse?
An unofficial guide to using Mastodon and the Fediverse

How to discover hashtags to follow on Mastodon and the wider Fediverse
An unofficial guide to using Mastodon and the Fediverse

ActivityPub Over ATProto
Thought experiment: how hard would it be to implement ActivityPub over ATProto? The answer might surprise you!


Introducing ATProto Science - Cosmik Labs
Announcing atproto.science! #ATproto has huge potential for supporting new ways of doing research, so we started @atproto.science to help bring together researchers, build community, and explore what's possible when science meets cutting-edge open social network protocols! 🧪 >
I'd say the best deep-dive comparing ActivityPub and atproto is this video by @thisismissem.social , who has gobs of experience with both: youtube.com/watch?v=BZgNMiw3lTY
ActivityPub, AT Protocol, and more!
www.youtube.comooh nice my talk got posted! this is a 30 min whirlwind introduction to atproto through a technical lens, basically building up the stack from DIDs -> repos -> PDSes -> relays -> lexicons -> OAuth -> applications
FediForum
Have you ever wondered how #ATProto actually works? This presentation by Daniel Holmgren from #FediForum should answer your questions in 30 minutes. spectra.video/w/mDnE8FbYh1PXiaCPxsniGQ /cc @dholms.at
Hey #ATproto peeps, need your help! Doing an unconference session about ATproto at the Experimentation Elite conference today. Need some kind of short intro slide(s) about what we are.... any good examples you've seen I could re-use?
my hot take is that @semble.so is on par with traditional search engines for atproto related topics (and it's only curated by people!)
Eli Mallon
Starting to get conspiratorial about how hard it is to Google atproto stuff. Why does "list of public atproto relays" not take me directly to pulsar.feeds.blue? For that matter, why does "pulsar.feeds.blue" not show up on Google whatsoever? There's no robots.txt, it's not that
Some initial atproto-related learnings from #Rebuild Helsinki 🇫🇮 * most people building apps here have no idea what atproto is, which is a shame since especially when building social apps, atproto is a great starting point for many reasons

The Bluesky ecosystem has the juice (ATProto for normies) - Nate Spilman

nothin' but blue skies from now on
What It Means for Universities to Run Their Own PDS: The Potential of DID as Academic Infrastructure - Nightflight
From Attention to Intention - The Open Garden

Practical Decentralization