Telerik Test Studio is an application I have used in Software QA Automation. One project I had was api testing a REST web api for an MVC solution. This code can be used in almost any testing suite that allows you to import .NET 4.5.
API Testing Documentation
I am not going to recreate the post for this site just yet. You can find my original post; http://www.telerik.com/support/code-library/testing-rest-api-using-test-studio