HTTP 403 while using SharePoint Online REST API anonymously

Hey Team,
While using REST API to get list items (SharePoint Online) anonymously, I am getting HTTP 403 error:
Request: http://server/site/_api/web/lists('guid')/items?$select=Title,Products/Name&$expand=Products/Name
Response: HTTP 403 : System.UnauthorizedAccessException : Access denied. You do not have permission to perform this action or access this resource.
Authenticated users do not face this issue. The list has anonymous access (View) enabled. Anonymous users can access the lists without facing any issue.
I am not sure and could not able to find any link that says anonymous users can't use REST API to get SPListItems. Any input in this regard will be highly appreciated.
Regards,
Sanjay
Either you love IT or leave IT

Hi,
From this documentation from MSDN about
Reading data with REST, “Note that you cannot obtain an access token from code that is running on a browser client. You must obtain the access token from code that is running
on a server”, it will only allow the authenticated users who has an access token to access the REST API.
The two links below will provide more information about authentication in SharePoint 2013:
http://msdn.microsoft.com/en-us/library/fp142382.aspx
http://msdn.microsoft.com/en-us/library/jj687470.aspx
Thanks
Patrick Liang
Forum Support
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