AsyncAPI channel · WebSockets · WebSocket Communication API

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The primary WebSocket connection channel. After the opening handshake completes, this channel supports full-duplex message exchange using text or binary data frames.

Open source AsyncAPI → All WebSockets channels WebSockets provider profile
Provider: WebSockets AsyncAPI: v3.0.0 Spec: WebSocket Communication API Operations: 5 Messages: 5

Channel address

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Operations

send
sendMessage
Send a message to the WebSocket server
receive
receiveMessage
Receive a message from the WebSocket server
send
sendPing
Send a ping frame
receive
receivePong
Receive a pong frame
send
closeConnection
Initiate connection close

Messages

TextMessage
A UTF-8 encoded text message sent over the WebSocket connection
Content-Type: text/plain
BinaryMessage
A binary message sent over the WebSocket connection
Content-Type: application/octet-stream
Ping
A ping control frame used for keep-alive and connection health checks. May include up to 125 bytes of application data.
Content-Type:
Pong
A pong control frame sent in response to a ping. Contains the same application data as the ping it is responding to.
Content-Type:
Close
A close control frame used to initiate the closing handshake. Contains an optional status code and reason string.
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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