AT Protocol

Protocol behind Bluesky. Every account is a DID with a domain name as its handle. Its schema language, Lexicon, deliberately avoids RDF and JSON-LD in favour of strict, versioned schemas.

Read the specification ↗ atproto.com On GitHub ↗

Part of the thread Who issues your name online? proposes

builds on

• Content addressing concept [src]
• Decentralized Identifiers standard 2022 [src]
  did:plc and did:web
• IPLD standard [src]
  data model aligns with DASL, a subset of IPLD

maintained by

• Bluesky Social PBC organization 2021 [src]

alternative to

• ActivityPub standard 2018 [src]
  rival protocols for decentralised social media
• JSON-LD standard 2014 [src]
  Lexicon was chosen instead of JSON-LD
• RDF standard 1999 [src]
  Lexicon was chosen instead of RDF for strict, typed schemas

contributors

• Daniel Holmgren person [src]
• Paul Frazee person [src]

subject of

• Bluesky and the AT Protocol: Usable Decentralized Social Media writing 2024 [src]

implemented by

• Bluesky project 2019 [src1][src2]

has part

• Lexicon standard [src]

[?] Unconfirmed

• start: First released as the Authenticated Data Experiment (ADX); renamed the AT Protocol in October 2022.

Sources

• https://atproto.com/guides/faq
• https://atproto.com/specs/data-model
• https://en.wikipedia.org/wiki/AT_Protocol