Syndica ChainStream API
ChainStream is Syndica's real-time Solana data streaming API. It consolidates updates from multiple validators using a "fastest wins" strategy so the subscriber benefits from the lowest-latency notification across the validator set, and offers an optional `verified` parameter that delivers only transactions confirmed by multiple validators at `processed` commitment. ChainStream uses JSON-RPC 2.0 over WebSocket (`wss://chainstream.api.syndica.io/api-key/`) and supports `transactionsSubscribe`, `slotsSubscribe`, and encoded `blocksSubscribe` against `solana-mainnet` (devnet coming). Production users have cut limit-order time-to-fill from 10s to 300ms with it.
Syndica ChainStream API is one of 4 APIs that Syndica publishes on the APIs.io network, described by an AsyncAPI event-driven specification.
Tagged areas include Solana, ChainStream, Streaming, WebSocket, and JSON-RPC. The published artifact set on APIs.io includes API documentation, an API reference, authentication docs, an engineering blog, and an AsyncAPI specification.
Requests are made against the base URL wss://chainstream.api.syndica.io.
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