With the upcoming release of ASP.NET 2012.2 rC, the developers will be adding suport of OData WEb API. It is not as hard as you think it is, in fact, you can get stared with ASP.NET Web API OData in three easy steps:
Step 1: Create your EDM Model
Step 2: Configure your OData Route
Step 3: Implement the OData Controller
Be reminded that the code snippets that will be available in this tutorial won’t work unless you are using then nightly build. Upgrade to the latest nightly build using the instruction found in the MSDN website.
Read the rest of the tutorial here:Â http://blogs.msdn.com/b/webdev/archive/2013/01/29/getting-started-with-asp-net-webapi-odata-in-3-simple-steps.aspx