Power Platform Community Forum Thread Details

Hi everyone,

I'm encountering an issue while testing a custom connector in Copilot Studio. The connector is successfully tested in the Custom Connector Test tab, and it returns a valid HTTP 200 response with the expected OData payload. However, when I use this connector as a tool in a Copilot agent topic, I receive the following error:

What I’ve Done So Far:

Added a 'default response schema' using a simplified sample of the actual response.
Set the 'Content-Type' header to application/json.
Limited the response using $top=5 and selected only a few fields.
Verified that the connector returns a clean, valid JSON response.
Tried using /Connector-GWSample.Run() => $response in the topic and added a Trace($response) step.

Despite all this, the connector still fails when used in a topic.

Sample Response Schema Used:

{
  "d": {
    "results": [
      {
        "BusinessPartnerID": "0100000000",
        "CompanyName": "SAP",
        "EmailAddress": "******@sap.com"
      }
    ]
  }
}

What else could be causing this ConnectorRequestFailure even though the HTTP status is 200 and the response is valid? Is there a specific format or limitation Copilot Studio expects that I might be missing?

Any help or guidance would be greatly appreciated!

Thanks in advance.

Categories:

Model context protocol