Use jQuery.getJson to get Web API

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What is JSONP all about? [duplicate] 7 answers

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You need enable CORS in you WebAPI. Firstly, install this Nuget - https://www.nuget.org/packages/Microsoft.AspNet.WebApi.Cors and then add this line to WebApiConfig:

config.EnableCors(new EnableCorsAttribute("*","*","*"));

WebApiConfig:

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {

        config.EnableCors(new EnableCorsAttribute("*","*","*"));

        // Web API configuration and services
        // Configure Web API to use only bearer token authentication.
        config.SuppressDefaultHostAuthentication();
        config.Filters.Add(new HostAuthenticationFilter(OAuthDefaults.AuthenticationType));

        // Web API routes
        config.MapHttpAttributeRoutes();

        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );
    }

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