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Send SharePoint attachment to a Post API Call

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Posted on by SN9

I have a flow which has the when a new item is created to a SharePoint list trigger. The problem statement is to send the excel attachment from the SharePoint list item to a POST API call. I have researched the community and documentations however I am always getting the unsupported media type error. It will be really helpful if someone can help me with where I am going wrong.

This my current workflow design:

Here is the error:

This works as expected in Postman though.

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Building flows

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SN9 4 on at

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@NickWarner : I tried referring your solution but I am struggling with the body.

https://powerusers.microsoft.com/t5/Building-Flows/HTTP-POST-an-xlsx-file-to-API-endpoint/td-p/830027

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NickWarner 113 on at

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Hi @SN9

It's been quite a while since I did that flow and it looks like I might not even have it in use anymore. the key difference I can see is that mine used a library as a source rather than a list so the get files by path connector that I used that provided the right value wouldn't work for you. looking at your body code my suggestion would be to change your hardcoded $content-type value to
type=application/vnd.ms-excel
assuming it is always going to be an excel file.

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