







Energy networks built on open protocols — from a Bluesky post about AI emissions to a case for open protocols in the energy sector, built on the AT Protocol.
Understanding Atproto - AT Protocol Docs - AT Protocol
Dive deeper into the concepts behind the AT Protocol.

FediForum Talk: Atproto: A Technical Introduction
By Daniel Holmgren, head of protocol at Bluesky PBC. AT Protocol (atproto) is the open protocol powering Bluesky and the emerging Atmosphere. This talk gives a high-level overview of atproto's app...
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.


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.

Atproto Ethos - AT Protocol
A deep dive into the philosophical and aesthetic principles underlying the design of AT Protocol.

What is atproto?
What is atproto? atproto is two things: A protocol for creating open social networks An open social network atproto, the open social network Today the atproto network has 36+ million users and powers Bluesky and a handful of other apps. Almost all atproto data is public. Content like posts, likes, follows, and photos/videos are publicly accessible to any network participant in a permissionless way. As an example of how open the network is, here’s how easy it is to stream all public data on the network using a public atproto Relay like bsky.network:

Introduction to AT Protocol
Walkthrough of the various parts and concepts in Bluesky's AT Protocol (ATProto), the types of servers involved and how it all fits together

Introduction to AT Protocol
Walkthrough of the various parts and concepts in Bluesky's AT Protocol (ATProto), the types of servers involved and how it all fits together

ATProto Architecture
Visual summary of the AT Protocol architecture: PDS, AppView, identity, records, lexicons.

Very cool project connecting atproto with the Underlay knowledge graph protocol "[The Underlay] is an archive. [atproto] is a wire. Together they give a collection both permanence and real-time distribution." And check out these neat #ATScience examples too! underlay.org/blog/2026-04-28-atproto-integ…
Very cool project connecting atproto with the Underlay knowledge graph protocol "[The Underlay] is an archive. [atproto] is a wire. Together they give a collection both permanence and real-time distribution." And check out these neat #ATScience examples too! underlay.org/blog/2026-04-28-atproto-integ…
threddyrex/atproto-links

Bluesky handle directory – PDSes
arroba — arroba 3.0 documentation
What is the Atmosphere? - Leaflet Lab Notes
PDS Sync
Atmospheric Login Page

Account hosts

Apps
AT Stack (by Victoria) — Semble
trueberryless/awesome-atproto
PDSls

ATmosphere Games