$default
The $default route is invoked when no other route matches the incoming message. This serves as a fallback handler for messages that do not match any custom route selection expression. It is also used when the route selection expression evaluates to a value that does not match any defined route key.
Channel address
Operations
Messages
application/jsonAbout 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 Agent Skill and MCP server surfaces of the same providers.