Infonomenon (Beta) — Search the AT Protocol
panproto | schematic version control
One engine for schematic version control within and across any schema language. Built on generalized algebraic theories for provably correct migrations.
Move your data to Blacksky
Move your data to Blacksky – transfer your AT Protocol account in minutes.

Lexicon Management - Nick's Blog
You can use Lexicon Garden to create and manage lexicon schemas right from the browser.
Lexicon Garden - ATProtocol Lexicon Browser
Browse and discover ATProtocol lexicon schema definitions
Standard.site - One schema. Every platform.
Standard.site provides shared lexicons for long-form publishing on AT Protocol. Making content easier to discover, index, and move across the ATmosphere.

Publishing ATProto Lexicons - Nick the Sick's blog. Writings, projects and ideas.
AT Explore MCP Server
Resolve handles to DIDs, find user profiles, and explore identity metadata across the network.
quickslice - Introduction
Warning This project is in early development. APIs may change without notice.

Quick getting started notes on tap
Bluesky released a new backfill/firehose tool today called Tap. These are some quick notes on trying it out to make it easier for anyone to give it a go.
Introducing Tap: Repository Synchronization Made Simple | Bluesky
Just about every app built on AT needs data from a repository at some point. For many use cases – feed generators, labelers, bots – streaming live data through a Relay or Jetstream works well. But some applications need to go beyond what Jetstream was designed for, like tracking specific subsets of a repo, automatically backfilling a database when adding new repos to monitor, or even mirroring the entire Atmosphere.

atproto/packages/sds at dev · hypercerts-org/atproto
Friendly fork of ATProto for Hypercerts. Contribute to hypercerts-org/atproto development by creating an account on GitHub.
Rethinking Lexicon Tooling for Third-Party Developers - Matthieu's Leaflet
The official Lexicon code generation tooling hasn't evolved much since its initial release. While it serves the core atproto codebase well, third-party developers face significant challenges with bundle size, manual maintenance, and architectural constraints that make building production-ready applications unnecessarily difficult.
Announcing eurosky.social accounts - launching January 2026. ✅ Managed by Eurosky, a European non-profit initiative ✅ Hosted on European cloud ✅ Governed by European law eurosky.social/register
Register for a eurosky.social account - one web identity, dozens of apps — eurosky
www.eurosky.social