AsyncAPI channel · Mastodon · Mastodon Streaming and Web Push API

/api/v1/streaming

Multiplexed WebSocket entry point. After connecting, the client either passed `?stream=` (and any required `tag`/`list`) on the upgrade request, or sends one or more JSON `subscribe` control frames to attach to streams. The server emits framed JSON messages identifying which stream produced each event.

Open source AsyncAPI → All Mastodon channels Mastodon provider profile
Provider: Mastodon AsyncAPI: v2.6.0 Spec: Mastodon Streaming and Web Push API Operations: 2 Messages: 4

Channel address

/api/v1/streaming

Operations

publish
sendControlMessage
Client -> server control message (subscribe / unsubscribe).
receiveStreamFrame
Server -> client stream event frame.

Messages

SubscribeControl
Client asks the server to start delivering events for a stream.
Content-Type: application/json
UnsubscribeControl
Client asks the server to stop delivering events for a stream.
Content-Type: application/json
WsStreamFrame
Wrapped event delivered over the multiplexed WebSocket.
Content-Type: application/json
WsErrorFrame
Server-side error reported over the WebSocket.
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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Tools for event channels

4 MCP tools reach this
  • find_channelsBrowse and filter every channel in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
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