AsyncAPI channel · Ably · Ably Realtime Protocol

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Control-plane ProtocolMessages exchanged on the WebSocket connection itself (not scoped to a channel). Carries CONNECT, CONNECTED, HEARTBEAT, DISCONNECT, DISCONNECTED, CLOSE, CLOSED, ERROR, and AUTH actions.

Open source AsyncAPI → All Ably channels Ably provider profile
Provider: Ably AsyncAPI: v3.0.0 Spec: Ably Realtime Protocol Operations: 3 Messages: 8

Channel address

/

Operations

send
connectClient
Client opens the WebSocket and authenticates.
receive
receiveConnectionEvents
Server-pushed CONNECTED / HEARTBEAT / DISCONNECTED / CLOSED / ERROR / AUTH frames.
send
closeConnection
Client sends CLOSE to gracefully terminate the connection.

Messages

connected
Server confirmation that the realtime connection is established.
Content-Type:
heartbeat
Keep-alive ping. Ably sends heartbeats every 15s by default.
Content-Type:
disconnect
DISCONNECT
Content-Type:
disconnected
Connection has dropped. SDK will attempt to reconnect.
Content-Type:
close
Client request to gracefully close the connection.
Content-Type:
closed
CLOSED
Content-Type:
error
Protocol-level or channel-scoped error.
Content-Type:
auth
Mid-connection auth refresh (token reauth).
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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