I've built several RESTful APIs using both ASP.Net MVC2 and OpenRasta, it's good see I can now do the same very easily using the new open source WCF Web API . Glenn Block had a great presentation @ MIX11, check out the video There's a great description why going with a SOAP based web API doesn't scale well in todays current web landscape- using POST everywhere means intermediate caches can't help with GET styled SOAP requests, check out about 5 mins in... WCF Web API, "There's a uri for that" from Glenn Block on Vimeo .