Lesson plan
AT Protocol
The AT Protocol (Authenticated Transfer Protocol, pronounced "at protocol", commonly shortened to ATproto or "ATP") is a protocol and set of open standards for decentralized publishing and distribution of self-authenticating data within the social web. It serves as the technical foundation of the Bluesky social network, originally developed as a reference implementation for the protocol, as well as an ecosystem of interoperable social applications and services collectively referred to as the ATmosphere. The AT Protocol aims to address perceived issues with earlier decentralized social networking protocols such as ActivityPub and Nostr; these include user experience, semantic interoperability, discoverability, network scalability, and portability of user data and social graphs. It employs a modular microservice architecture and a federated, server-agnostic user identity to enable seamless movement between network services, with the goal of providing an integrated online experience without dependence on any single privileged entity. As of January 2026, the protocol's general architecture, user repository, and data synchronization specifications are in the process of standardization within the Internet Engineering Task Force (IETF).…
Article summary
The AT Protocol (Authenticated Transfer Protocol, pronounced "at protocol", commonly shortened to ATproto or "ATP") is a protocol and set of open standards for decentralized publishing and distribution of self-authenticating data within the social web. It serves as the technical foundation of the Bluesky social network, originally developed as a reference implementation for the protocol, as well as an ecosystem of interoperable social applications and services collectively referred to as the ATmosphere. The AT Protocol aims to address perceived issues with earlier decentralized social networking protocols such as ActivityPub and Nostr; these include user experience, semantic interoperability, discoverability, network scalability, and portability of user data and social graphs. It employs a modular microservice architecture and a federated, server-agnostic user identity to enable seamless movement between network services, with the goal of providing an integrated online experience without dependence on any single privileged entity. As of January 2026, the protocol's general architecture, user repository, and data synchronization specifications are in the process of standardization within the Internet Engineering Task Force (IETF).…
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.