Every record type in the app.at3d namespace. These AT Protocol Lexicons define portable 3D identity data stored in a user's Personal Data Server.
at3d.app — portable 3D identity for AT Protocol
An open standard for portable 3D and 2D avatars, virtual worlds, and game characters on the AT Protocol network.
atmoprints - 3D Models on AT Protocol
A decentralized 3D model hosting platform built on AT Protocol. Share, discover, and download 3D printable models on the open social web.
Glossary of terms - AT Protocol
A collection of terminology used in the AT Protocol and their definitions.
Blog | Lexicon Community | Offprint
A working group that stewards a shared namespace for AT Protocol schemas: built in the open, governed collectively, and free for anyone to use.
Developer docs · atjam
Build on the at.atjam.* lexicons, or extend them for your own domain — tutorials, how-to guides, an extension guide, and the API reference.
ATFISL — content discovery with the AT Protocol
How ATFISL publishes CID locations as dev.fisl.at records on the AT Protocol: the record, the record key, the Lexicon, and indexing.
ATProto Architecture
Visual summary of the AT Protocol architecture: PDS, AppView, identity, records, lexicons.
A /now lexicon for AT Protocol is taking shape. @tynanpurdy.com is defining `now.nownownownow.entry` -- simple records for sharing current-status updates, connected to Derek Sivers' nownownow.com ecosystem. Seeking a co-lead and schema feedback. Join the WG on Discourse.
Nownownownow.now a lexicon for /now
discourse.atmosphere.communityWelcome to the new Aturi... a suite of tools for touring the Atmosphere & exploring the AT Protocol. 1. Explorer — Inspect the data inside every account 2. Extension — Switch apps in 1 click (or zero), detect URIs, inspect data 3. Universal Links — Share content, let them pick a client aturi.to
Lexicon Community
Daniel Holmgren's (@dholms.xyz) FediForum talk on AT Protocol Spaces is now available. Covers permissioned spaces, DPoP+ath tokens, and space-scoped addressing - the core infrastructure behind the next wave of apps building on the atmosphere.
FediForum October 2026 - Spectra Video
spectra.video