After a message is sent, a reply is sent almost instantly from the Flow AI engine.

Success message response

The following is a reply to the message if it is successfully delivered.

{
  "type": "message.delivered",
  "payload": {
    "traceId": 1,
    "threadId": "EXAMPLE73ca74dfe9329bf68c09b61ce",
    "traceId": 1111111111111,
    "speech": "hi"
  }
}

Error message response

The following is an error message reply when there is an error processing a message.

{
  "type": "error",
  "message": "Invalid message format ..."
}