AsyncAPI channel · Courier
· Courier Inbox Real-Time API
inbox/unopened
Fires when a previously-opened message is marked unopened.
Channel address
inbox/unopened
Operations
subscribe
onUnopened
A message was marked unopened.
Messages
Unopened
A message was marked unopened.
Content-Type:
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 Naftiko capability, Agent Skill, and MCP server surfaces of the same providers.