USING UI.grid.info

if you modify your WebApiConfig as follows you'll get JSON by default.

public static class WebApiConfig

{

public static void Register(HttpConfiguration config)

{

config.Routes.MapHttpRoute(

name: "DefaultApi",

routeTemplate: "api/{controller}/{id}",

defaults: new { id = RouteParameter.Optional }

);

var appXmlType = config.Formatters.XmlFormatter.SupportedMediaTypes.FirstOrDefault(t => t.MediaType == "application/xml");

config.Formatters.XmlFormatter.SupportedMediaTypes.Remove(appXmlType);

}