Creating a custom ASP.NET web service in Visual Studio 2010 and up Follow the article here: http://blogs.msmvps.com/windsor/2011/11/04/walkthrough-creating-a-custom-asp-net-asmx-web-service-in-sharepoint-2010/ http://sharepoint.softwaredevelopmentoutpost.com/2014/04/sharepoint-2013-create-custom-wcf-rest.html