Using Azure ACS (Access Control Service) with ASP.NET Web API?

It is supported. ASP.NET Web API allows us to build REST services. ACS supports any kinds of REST services.

The usual claim validation process described on http://msdn.microsoft.com/en-us/library/windowsazure/hh289317.aspx will work. We just need to change WCF to Web API.

From my experience, the link you pointed out will probably not help, as it is used for clients (WPF/Windows Phone/etc.). Using ACS on the service side, we will deal with claims, we can configure ACS to return any claims we like. A claim can be a username, but it can also be a role.

For example, we can create a rule to map a particular user to a role, than ACS will return the role claim to us.

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