Authenticated Transfer (atp)

Document dependencies

Authenticated Transfer (atp)

Document dependencies

The AT Protocol | Bluesky

The AT Protocol (Authenticated Transfer Protocol, or atproto) is a standard for public conversation and an open-source framework for building social apps.

IETF124: Authenticated Transfer (ATP) Pre-BOF - ATProto Community

Nov 5th, 2025 in Montreal

Authenticated Transfer: Architecture Overview

Authenticated Transfer (AT) is a collection of protocol components that together provide a generic framework for interoperable social web applications, using global aggregations of interlinked, self-certifying data records. This informational document provides an overview of the entire system, as implemented in late 2025. Some of those components may be in scope as work for the IETF, while other components may not. Many components are general-purpose and may find use outside of the context of AT. The intent of this document is to provide context for how all the components can fit together for certain use cases.

atproto.nl

The AT Protocol community in the Netherlands

Why a New Protocol? The History and Future of AT Protocol - AT Protocol

Bluesky CTO Paul Frazee and Head of Protocol Daniel Holmgren join for a wide-ranging conversation about what atproto is, why it exists, how it got built, and where it's going next. From a Twitter consultancy to an IETF working group, this is where to get started.

AT Protocol - AT Protocol

Specification for the Authenticated Transfer Protocol (AT Protocol)

Understanding Atproto - AT Protocol Docs - AT Protocol

Dive deeper into the concepts behind the AT Protocol.

Protocol Reader - Summer of Protocols

The Protocol Reader The Protocol Reader is an 358-page book (currently only available as an epub) comprising 26 foundational essays by 31 authors from the Summer of Protocols program, carefully edited and sequenced to introduce you to the fascinating new discipline of Protocol Studies. It can serve as

Support for atproto at IETF 126

As many of you know, the IETF 126 is happening in Vienna next week and there is a working session on atproto on Thursday, July 23rd. In order to show the IETF that there is interest in the topic from the community, I’m sharing how you can register for remote sessions to the IETF 126, inspired by @chadkoh.com‘s post from IETF 124 in Montreal. Just like previously stated for the Montreal presence, I also think it is important to show that there is a vibrant community interested in atproto that i...