AsyncAPI channel · Sequence Markets
· Sequence Markets Streaming API
book:{symbol}
Per-venue L2 order book updates.
Channel address
book:{symbol}
Parameters
symbol—
Messages
streamEvent
Multiplexed channel event.
Content-Type:
About AsyncAPI
The AsyncAPI specification describes event-driven APIs the way OpenAPI describes request/response APIs. A channel is the named pipe — a webhook URL, a Kafka topic, a WebSocket route, an MQTT subject — that producers and consumers publish or subscribe to. Each channel carries one or more messages with structured payloads, and an operation declares whether a given party sends or receives on that channel.
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Work with this as data
Every channel here is available over the APIs.io API and to AI agents over MCP.