new atproto project ✨ Asterism is a backlink indexer like Constellation, and implements the same public API. It consumes the Firehose directly for very low latency (near real time) indexing, but it still runs comfortably on low-end hardware. tangled.org/aly.codes/asterism
aly.codes/asterism
tangled.orgJul 7, 2026 at 3:21 PM
firehose.stream — ATProto jetstreams
A lightweight, filterable JSON firehose of real-time ATProto events.
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:
Welcome to the new atproto.com - AT Protocol
We've updated just about everything about atproto.com to make it easier for developers to just build things.
ATProto Garden
A curated directory of apps, tools, and libraries built on the AT Protocol
skydeval/horizon-firehose
A Rust-based ATProto firehose consumer with CBOR/CAR decoding, per-relay failover, and Redis stream publishing
ATProto Architecture
Visual summary of the AT Protocol architecture: PDS, AppView, identity, records, lexicons.
Slingshot: atproto edge record cache
API Documentation for Slingshot, a firehose-listening atproto edge record and identity cache.
Slingshot: atproto edge record cache
API Documentation for Slingshot, a firehose-listening atproto edge record and identity cache.
Slingshot: atproto edge record cache
API Documentation for Slingshot, a firehose-listening atproto edge record and identity cache.
Is there interest in an ATProto service that given any URL, returns a unified backlink summary across the ecosystem? E.g., bookmarks on @semble.so , mentions on Bluesky or @standard.site , annotations in @margin.at, etc.
I love that the design of atproto was in part inspired by big social Kafka and ScyllaDB server backends and @martin.kleppmann.com's Designing Data-Intensive Applications and the community immediately used it to implement thousands of apps with no backend lol
ATProto, Activitypub and FOSS applications
Two protocols, and an acronym. Directories, servers, services and tools that support one or more of these namesakes' or these namestakes' ideals [decentralized, federated etc]. Plus a few wikis for further reading.
AT Protocol apps
Apps and services on ATProto (aside from Bluesky). See “AT Protocol” collection for links related to the protocol itself, as well as “Bluesky” for Bluesky clients etc.
AT Protocol
Bookmarks related to ATProto itself. See also “Bluesky” and “AT Protocol apps” collections
A quick look at every link that's been added thus far.
Session | Send Messages, Not Metadata. | Private Messenger
NextGraph - Decentralized, encrypted and local-first platform and framework, towards the better internet we all deserve!
Freenet
Berty · Berty Technologies
p2panda
Compose | Taproot
Compose | Taproot
ATScience Ecosystem Map
Bluesky Protocol Services
Explore
AnyPub
ATLoop
Zeens — Photography, undiluted.
A Markdown Editor on AT Protocol — Diffdown
atmoBB Forums
Your files. Your account.
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