Authenticated Transfer (atp)

Authenticated Transfer (atp)

Document dependencies

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.

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

Nov 5th, 2025 in Montreal

AT Protocol - AT Protocol

Specification for the Authenticated Transfer Protocol (AT Protocol)

graham.systems/cistern

Encrypted, ephemeral, private memos on atproto

chrisvanderloo.com/at-astro

An Astro integration for the AT Protocol. Implements authentication and content loaders for ATProto records.

ATProtocol Attestations: Cryptographic Signatures for the Decentralized Web - Nick's Blog

This post introduces the formal ATProtocol attestation specification, a framework for adding cryptographic signatures to ATProto records through two complementary patterns: inline attestations that embed signatures directly in records, and remote attestations that store proof in separate repository records. The specification prevents replay attacks through repository binding, uses CID-based content addressing for integrity, and provides the cryptographic foundation for verified credentials, trusted content, and authenticated interactions in the decentralized ATProtocol ecosystem.

attested.network — Proof of Payment for ATProtocol

An open specification for decentralized, cryptographically verifiable proof of payments.

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.