SMN Event Source

Simple Message Notification (SMN) sends messages to email addresses, mobile phones, or HTTP/HTTPS URLs. If you create a function with an SMN trigger, messages published to a specified topic will be passed as a parameter to invoke the function. Then, the function processes the event, for example, publishing messages to other SMN topics or sending them to other cloud services.

For details, see Using an SMN Trigger.

SMN example event

smn_event.json

{
  "record": [
      {
          "event_version": "1.0",
          "smn": {
              "topic_urn": "topicUrn",
              "timestamp": "2018-01-09T07:11:40Z",
              "message_attributes": null,
              "message": "this is smn message content",
              "type": "notification",
              "message_id": "a51671f77d4a479cacb09e2cd591a983",
              "subject": "this is smn message subject"
          },
          "event_subscription_urn": "functionUrn",
          "event_source": "smn"
      }
  ],
  "functionname": "test",
  "requestId": "7c307f6a-cf68-4e65-8be0-4c77405a1b2c",
  "timestamp": "Tue Jan 09 2018 15:11:40 GMT+0800 (CST)"
}

Parameter description

Parameter	Type	Description
event_version	String	Event version
topic_urn	String	ID of an SMN event
timestamp	String	Time when an event occurs
message_attributes	Map	Message attributes
message	String	Message content
type	String	Event type
message_id	String	Message ID. The ID of each message is unique.
subject	String	Subject of message
event_subscription_urn	String	Subscription ID
event_source	String	Event source: smn

Example

last updated: 2026-01-07 09:53:05 UTC - commit: b52ca97e4a0ec4c999820539460bd4ab093efa89