The single callback path the consumer registered with Mailchimp. All six event types are delivered to this same URL; subscribers discriminate on the `type` form field.
A subscriber's email address was cleaned from the list.
Content-Type: application/x-www-form-urlencoded
upemail
A subscriber's email address was changed.
Content-Type: application/x-www-form-urlencoded
campaign
A campaign was sent or cancelled.
Content-Type: application/x-www-form-urlencoded
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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