---
tags:
  - protocol
aliases:
  - ATProto
  - Authenticated Transfer Protocol
link: https://atproto.com
---
Website: <https://atproto.com/>

Developed by [[Bluesky]]

> The AT Protocol is a networking technology created to power the next generation of social applications. The initial reference application, [bsky.app](https://bsky.app/),provides a global-scale microblogging experience.

## Protocol Overview 

> The **Authenticated Transfer Protocol**, aka **atproto**, is a federated protocol for large-scale distributed social applications. This document will introduce you to the ideas behind the AT Protocol.

From the [Protocol Overview](https://atproto.com/guides/overview)

## Specification

> The Authenticated Transfer Protocol (AT Protocol or atproto) is a generic federated protocol for building open social media applications. Some recurring themes and features are:
> 
> - self-authenticating data and identity, allowing seamless account migrations and redistribution of content
> - design for "big world" use cases, scaling to billions of accounts
> - delegated authority over application-layer schemas and aggregation infrastructure
> - re-use of existing data models from the dweb protocol family and network primitives from the web platform

From the [Specification](https://atproto.com/specs/atp)

## PDS

Personal Data Server. Similar in concept to [[Personal Data Store]], except this is the software server and can host multiple user accounts.

* Github [bluesky-social/pds](https://github.com/bluesky-social/pds)
* Discord [AT Protocol PDS Admins](https://discord.gg/UWS6FFdhMe)