How to connect to sharepoint on premise list with powerBI, it always give me 403 forbiddnen

http://oururl/_api/web/lists/getbytitle('Sample_Proposal')

Hi,

For the 403 forbidden error when connect SharePoint list using OData in PowerBI, I suggest you can use Fiddler to trace the web request for more detailed information.

Fiddler

Here is a detailed article about connect SharePoint list data using Rest Service in Power BI for your reference:

Access Office 365 list with Power BI

Thanks

Best Regards