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Hi PagerDuty Community,

I'm currently working on integrating ServiceNow with PagerDuty using the REST API. While testing the incident update (status change to "acknowledged") via Postman, I'm encountering the following error response:

My API details and headers are correct. I used the same call from the PagerDuty REST Explorer; there, the integration is working fine.

{ "error": { "errors": [ "Incident error illegitimate_requester_error" ], "code": 2001, "message": "Invalid Input Provided" } }

 

Hi ​@Mohan Mallapu,

The illegitimate_requester_error you’re getting usually means the user making the API call isn’t authorized to update the incident, even if your API key and headers look correct. Here are a few things you can check:

  • Make sure your request includes the From header, set to the email address of a valid PagerDuty user who has permission to update the incident.
  • The user in the From header should be assigned to the incident or have the right to acknowledge it.
  • Double-check that your API key is a REST API key with the right permissions.
  • The REST API Explorer might use your logged-in user context, so make sure you’re explicitly setting all headers in Postman.

Please let me know if any of these are helpful, and have a nice day!

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