







Brings together ActivityPub and Solid Pods and empowers developers to create truly decentralized applications.
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
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.
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.
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ActivityPub Client API: A Way Forward | Steve Bate
The ActivityPub Client-to-Server (C2S) protocol was envisioned as a cornerstone of the decentralized social web, along with the Server-to-Server (S2S) protocol. Standardized by the W3C in 2018, C2S defines how user-facing applications, such as mobile apps or web clients, and bots should interact with social servers using Activity Streams 2.0 and JSON-LD. In theory, it ... Read more

ATmosphere 1.0.0 — Liftoff
This post isn’t about the ActivityPub plugin. ATmosphere is a separate plugin from the same small team, for the other half of the open social web: the AT Protocol, the open network behind Blu…

ActivityPub
Connect your site to the Open Social Web and let millions of users follow, share, and interact with your content from Mastodon, Pixelfed, and more.

Integrating ActivityPub within Solid specs
I’ve been spending a bit of time catching up on this discussion and experimenting. I have successfully subscribed to remote ActivityPub actors and processed inbox activities. (My write-up: JG10 Solid devlog ) I ended up using an architecture not yet mentioned here, in which the inbox and outbox are public append LDP containers that receive activities. Solid notifications are used to notify an external agent that reads the new activity and processes it. This works because Solid already supports...

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...
skarnio (@skarnio@alquimidia.social.br)
@vicwalker @sirius Tem algumas frentes de trabalho interessantes, como criar objetos portáteis nativos dentro do #ActivityPub (https://github.com/reiver/vibefed/blob/master/skills/kb-fediverse-portable-objects/SKILL.md) e a possibilidade AP + #Solid (https://activitypods.org / https://) e até com AT (https://forum.solidproject.org/t/integrating-activitypub-within-solid-specs/8355/26). Acredito que seja uma questão de tempo pra esse salto quântico na Web Social Aberta. O que acha @navigator?
The Long Tail of Work Left Until ActivityPub Has E2EE - Dhole Moments
Separate from my proposal for key transparency for the Fediverse (which I’ve certainly blogged about a lot), the W3C has been working on building out end-to-end encryption (E2EE) for Activity…

Exploring the idea of self-hosting a Bluesky PDS alongside my Indiekit instance — turning it into a dual-protocol server that federates over both ActivityPub and AT Protocol simultaneously. Inspired by Wafrn’s approach, adapted to Indiekit’s plugin architecture and Cloudron deployment. The goal: ow…
Ricardo Mendes
rmendes.netFrom Bluesky’s work on permissions data, to adding e2ee to activitypub, there are a lot of projects working on private data, converging towards something that’s roughly Matrix-shaped. But the dynamics underneath turned out to be stranger than I thought connectedplaces.online/reports/fr163-decrypting-matr…
FR#163 – Decrypting Matrix
connectedplaces.online