transactional journey not triggered via postman

Question

I created my first transactional journey, token request is working but when I try to trigger it I am getting a 400 bad request. here is the request:

https://[subdomain].rest.marketingcloudapis.com/messaging/v1/email/messages/[email customerkey]

and here the body:

{​
"definitionKey": "[Event Definition Key]",
"recipient":
{​​
"contactKey": "000011111aaa",
"to": "[email protected]"
}​​
}​​

please what am I doing wrong? Thanks

Answer 1

I can confirm this works:

{{restEndpoint}}/messaging/v1/email/messages/{{$guid}}

Headers:

Content-Type: application/json
Authorization: Bearer {{accessToken}}

Body:

{
  "definitionKey": "abcde",
  "recipient":
  {
   "contactKey": "subscriberKey12345",
    "to": "[email protected]",
    "attributes": {
      "UserAttribute_1": "value_1",
      "UserAttribute_n": "value_n"
    }
  }
}

optionally also without attributes

{
  "definitionKey": "abcde",
  "recipient":
  {
   "contactKey": "subscriberkey12345",
    "to": "[email protected]"
  }
}

This looks pretty similar to your code, so maybe the error is inside your variables.

1. Please ensure the [ ] are not physically in your code. "abcde" in my example is the event definition key of my journey.

2. {{$guid}} in my example is a POSTMan standard to create a unique identifier for the sendout event, and is NOT the same as the email customerkey. This is a reference number that you set by sending the request for the sendout, not any existing IDs or key from inside SFMC.