I am trying to fire a triggered send REST API via postman, I have successfully created a package with all the permissions ticked, including email send,write. After generating the access token in the postman, try to fire the below-triggered send via the postman. 1046 is the external key of the triggered send. I have removed the tenant URL from the below link.

POST https://TENANTURLFROMPACKAGE.rest.marketingcloudapis.com/messaging/v1/messageDefinitionSends/1046/send

in the body posting the following payload
    "To": {
        "SubscriberKey": "[email protected]",
        "Address": "[email protected]",
        "ContactAttributes": {
            "SubscriberAttributes": {
                "EmailAddress": "[email protected]",
                "SubscriberKey": "[email protected]"
    "Options": {
        "RequestType": "ASYNC"

However I am getting the below error

403 Forbidden

Please note that triggered send is in a running state, and I was able to fire it successfully from AMPSCRIPT via cloudpages.

1 Answer 1


In the postman for the authorisation setting it was defaulted to inherit from parent. When I updated the authorisation setting to bearer, then it resolved the issue.

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