Jetstream

Protocol Sync

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Jetstream is a streaming service that consumes the AT Protocol com.atproto.sync.subscribe Repos firehose and converts CBOR-encoded MST data into lightweight JSON events that are easier to consume with standard tooling. It supports collection and DID filtering, cursor-based replay, zstd compression, subscriber-sourced filter updates, self-hosting, and public Bluesky-operated instances for developers who want sync data without implementing the full binary sync protocol.