Getting hostedContents value from Teams channel message using Graph API

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Posted on by VilPel

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Hello community,

I am trying to get the contents (images) of a Teams channel message in Power Apps / Power Automate. I have been following the documentation provided here: https://learn.microsoft.com/en-us/graph/api/chatmessagehostedcontent-get?view=graph-rest-1.0&tabs=http

Using the Graph Explorer to get the hosted contents works fine:

I am using the Teams HTTP connector in Power Automate. When I enter the same URL in there with the Content-Type as image/png (which is the actual content type), I get this error:

Everything works fine in Power Automate until I use the /$value parameter. What could be the mistake here and how do I fix it?

Error: Http request failed as the content was not valid: 'Unable to translate bytes [89] at index 0 from specified code page to Unicode.'.

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Expiscornovus 29,911 on at

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Getting hostedContents value from Teams channel message using Graph API

Have you tried the application/json Content-Type header instead in your Teams action to see if it returns the contentbytes and content type?