AsyncAPI channel · Mattermost · Mattermost WebSocket API

`/api/v4/websocket`

The single Mattermost WebSocket channel. The server publishes event envelopes to the client over this channel, and the client publishes action envelopes (including the initial `authentication_challenge`) back to the server.

Open source AsyncAPI → All Mattermost channels Mattermost provider profile

Provider: Mattermost AsyncAPI: v2.6.0 Spec: Mattermost WebSocket API Operations: 2 Messages: 6

Channel address

/api/v4/websocket

Operations

publish

sendClientAction

Send an action envelope to the server.

receiveServerMessage

Receive an event envelope or response from the server.

Messages

AuthenticationChallengeAction

Authenticate the open WebSocket with a token.

Content-Type: application/json

UserTypingAction

Notify the server that the user is typing.

Content-Type: application/json

GetStatusesAction

Request user statuses for users known to the connection.

Content-Type: application/json

GetStatusesByIdsAction

Request user statuses for a specific list of user IDs.

Content-Type: application/json

EventEnvelope

Real-time event broadcast from the Mattermost server.

Content-Type: application/json

ResponseEnvelope

Reply to a client action, correlated via `seq_reply`.

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.

Browse every event-driven channel on the APIs.io network or compare with the broader Naftiko capability, Agent Skill, and MCP server surfaces of the same providers.