Using HTTP with Entra ID connector action in Copilot Studio topic

(2) Share

Report

Posted on by inzil2k

192

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?

Categories:

Calling actions from Copilot Studio

I have the same question (5)

All responses (3)

Answers (0)

Sort by

Suggested answer

Michael E. Gernaey 53,958 Moderator on at

Like (0)

Report
Copy link

Link copied!

Hi @inzil2k

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?

Was this reply helpful? Yes No
inzil2k 192 on at

Like (0)

Report
Copy link

Link copied!

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:

Was this reply helpful? Yes No
IV-11121303-0 3 on at

Like (0)

Report
Copy link

Link copied!

I have a very similar problem:

I use the HTTP SharePoint Connector and try to obtain results from a SharePoint list. I have used the same connector from a Power Automate Flow which worked perfectly, but called from a topic in Copilot Studio I get a connectorPowerFxError trigger by a failed PVA.HttpRequest which provides a JsonReaderException.

Was this reply helpful? Yes No