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Power Platform Community / Forums / Copilot Studio - Calling Actions from Copilot S... / Using HTTP with Entra ...
Copilot Studio - Calling Actions from Copilot S...
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Using HTTP with Entra ID connector action in Copilot Studio topic

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Posted on by inzil2k 186
I'm trying to use an HTTP with Entra ID (preauthorized) action in Copilot Studio but it results in the following error:

Error Message: Evaluating PowerFx expression resulted in error while invoking the connector : PVA.InvokeHttp failed: JsonReaderException '<' is an invalid start of a value. LineNumber: 1 | BytePositionInLine: 0. Error Code: ConnectorPowerFxError Conversation Id: 155bc02d-be5f-408f-aa17-a1bbfcb882f1 Time (UTC): 2025-11-20T09:48:21.332Z

The connection in the action is set up to use on-premise gateway. The same connection works in Power Automate but not in Copilot Studio directly. Any ideas?

 
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Power Automate Flows
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  • Michael E. Gernaey Profile Picture
    Michael E. Gernaey 52,851 Super User 2025 Season 2 on at
    Using HTTP with Entra ID connector action in Copilot Studio topic
     
    This is both (well sort of expected) because CP and Power Automate do not run in the same context and do not require the same level of delegation permissions that CP does.
     
    Can I ask how you are using the Connector? In a Tool / Agent Flow?
     
     
  • inzil2k Profile Picture
    inzil2k 186 on at
    Using HTTP with Entra ID connector action in Copilot Studio topic
    hi Michael, 

    I'm using HTTP connector as a tool in the topic by going to Add a tool -> Connector -> HTTP with Entra ID (preauthorized). Then I create a simple GET request towards an on-premise URL:

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