AsyncAPI channel · Runway · Runway Characters Realtime Events

/session/data

Data channel for exchanging session control messages and metadata between the client and server, including session state changes, errors, and transcript data.

Open source AsyncAPI → All Runway channels Runway provider profile
Provider: Runway AsyncAPI: v2.6.0 Spec: Runway Characters Realtime Events Operations: 2 Messages: 4

Channel address

/session/data

Operations

publish
sendControlMessage
Send session control message
receiveSessionEvent
Receive session event

Messages

SessionControlMessage
Client-initiated control message for managing session behavior.
Content-Type: application/json
SessionStateEvent
Server-sent event indicating a change in session state.
Content-Type: application/json
TranscriptEvent
Server-sent event containing transcript data from the conversation, including both user speech and avatar responses.
Content-Type: application/json
SessionErrorEvent
Server-sent event indicating an error occurred during the session.
Content-Type: application/json

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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