Sitecore Web API registration

WebApiConfig.cs

using System.Net.Http.Formatting;
using System.Web.Http;
using Foo.Web;

// automatically exectute this class' Start() method right after Application_Start (without needing to change global.asax)
[assembly: WebActivatorEx.PostApplicationStartMethod(typeof(WebApiConfig), "Start")]

namespace Foo.Web
{
	public static class WebApiConfig
	{
		public static void Start()
		{
			GlobalConfiguration.Configure(Register);
		}

		public static void Register(HttpConfiguration config)
		{
			// initialize and map all attribute routed Web API controllers (note: this does not enable MVC attribute routing)
			config.MapHttpAttributeRoutes();

			// force JSON responses only (no XML)
			config.Formatters.Clear();
			config.Formatters.Add(new JsonMediaTypeFormatter());
		}
	}
}