ActivityPub
The ActivityPub protocol is a decentralized social networking protocol based upon the [ActivityStreams] 2.0 data format. It provides a client to server API for creating, updating and deleting content, as well as a federated server to server API for delivering notifications and content.
Activity Streams 2.0
Please check the errata for any errors or issues reported since publication.
Developer Documentation for ActivityPub & Fediverse | SocialDocs
The comprehensive developer resource for building with ActivityPub, Mastodon, and the Fediverse. Guides, specs, API reference, and tools.

ActivityPub, AT Protocol, and more!
Talking about this article and how ActivityPub and AT Protocol are maybe not as different as people might think. We covered some slides to an unrecorded talk of mine, which explores a lot of things...
ActivityPub
ActivityPub is a protocol and open standard for decentralized social networking. It provides a client-to-server (C2S) API for creating and modifying content, as well as a federated server-to-server (S2S) protocol for delivering notifications and content to other servers. ActivityPub is the defining standard of the Fediverse, a decentralised social network of various social interaction models, and content types, which consists of independently managed instances of software such as Mastodon, Pixelfed and PeerTube, among others.
ActivityPods - Personal data spaces powered with ActivityPub
Brings together ActivityPub and Solid Pods and empowers developers to create truly decentralized applications.

Event Bridge for ActivityPub
Integrating popular event plugins with the ActivityPub plugin.

Event Bridge for ActivityPub
Integrating popular event plugins with the ActivityPub plugin.

Support ActivityPub for GitLab (#11247) · Epics · GitLab.org · GitLab
Gitlab/ActivityPub Design Documents by @oelmekki
Just released an early preview of Zemble, a @zotero.org plugin for @semble.so! - Augment you Zotero library with all of the activity happening on Semble/Atmosphere. - Easily save and view items in Zotero on Semble. - Publish Zotero collections as Semble collections.
I find the idea of using CBOR as an alternative serialization for Activity Streams to be... interesting. w3c.github.io/cbor-ld/
CBOR-LD 1.0
w3c.github.ioThere are a lot of architectural bits, but if I had to pick one design feature it's Lexicons. Lexicons allow for new shared data types and structures in a way that are immediately available on network for any other service provider to adopt. Getting shared agreement in ActivityPub is hard.
Pedro Vezza
Why did you decide to bet on atproto over Mastodon or similar?
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.comRSS Parrot
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NextGraph - Decentralized, encrypted and local-first platform and framework, towards the better internet we all deserve!
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