In the early days the conceptual framework for AT was that the PDS was your user agent in the cloud. We were still figuring out the work division between the PDS and the apps, and hadn't established a clear idea of how things like read-sticky commits would work
Oct 3, 2025 at 12:56 AM
Drafts, private data, and obscurity.
The at:// protocol currently lacks any real means to have data which is both 'on-protocol', i.e. stored on your PDS in a way that you can guarantee access to...
Drafts, private data, and obscurity.
The at:// protocol currently lacks any real means to have data which is both 'on-protocol', i.e. stored on your PDS in a way that you can guarantee access to...
AT Protocol Roadmap (Spring 2026) - AT Protocol
Updates to the AT Protocol roadmap, including Permissioned Data and Account Experience.
AT Protocol Roadmap (Spring 2026) - AT Protocol
Updates to the AT Protocol roadmap, including Permissioned Data and Account Experience.
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.
OAuth for AT Protocol | Bluesky
We are very happy to release the initial specification of OAuth for AT Protocol! This is expected to be the primary authentication and authorization system between atproto client apps and PDS instances going forward, replacing the current flow using App Passwords and createSession over time.
OAuth Patterns - AT Protocol Docs - AT Protocol
Auth for AT Protocol application developers.
OAuth Patterns - AT Protocol Docs - AT Protocol
Auth for AT Protocol application developers.
I've been working on an "at protocol notion". One of the things that has been holding it up has been coming to terms with the oddities of putting this data on a PDS. A document is a collection of edits, whose edits we collect will change that document pretty substantially. This is a feature
@bsky.app recently acquired the trademark for AT Protocol (and variants) to help protect the ecosystem. Here’s more about what that means. atproto.com/blog/at-protocol-trademark
AT Protocol Trademark
atproto.com
