URLs as JSON to be used on the client

_Layout.cshtml

<script>
    define('urls', [], function () {                
        return @{ Html.RenderAction("GetApiUrls", "Api");};
    });
</script>

ApiController.cs

using System.Linq;
using System.Web.Mvc;
using Construction.Core.Features.QuickSearch;
using Construction.Core;
using Construction.Core.Extensions;
using Core.Helpers;
using Newtonsoft.Json.Linq;

public class ApiController : BaseController
{
    private static object _clientApiUrls;

    private object BuildClientApiUrls()
    {
        return new JObject(
            new JProperty("Root", Url.Content("~")),
            from url in _clientApiBuilder.GetUrls()
            select new JProperty(url.Name,
                new JObject(
                    from method in url.Methods
                    select new JProperty(method.Action, Url.Action(method.Action, method.Controller))
                )
            )
        );
    }
    
    public string GetApiUrls()
    {
        _clientApiUrls = _clientApiUrls ?? BuildClientApiUrls();
        return _clientApiUrls.ToJson();
    }
}

ClientApiBuilder.cs

using System.Collections.Generic;
using System.Linq;
using System.Web.Mvc;

public class ClientApiBuilder
{
    public IEnumerable<ClientApi> GetUrls()
    {
        return from type in typeof(ApiController).Assembly.GetTypes()
               where type.IsAssignableTo<Controller>() && !type.IsAbstract
               let controller = type.Name.Replace("Controller", "")
               let methods = from method in type.GetMethods()
                             where method.ReturnType.IsAssignableTo<ActionResult>()
                             where !method.HasAttribute<HttpPostAttribute>()
                             select new ClientApiUrl { Action = method.Name, Controller = controller }
               select new ClientApi { Name = controller, Methods = methods };
    }

    public class ClientApi
    {
        public string Name { get; internal set; }
        public IEnumerable<ClientApiUrl> Methods { get; internal set; }
    }

    public class ClientApiUrl
    {
        public string Action { get; internal set; }
        public string Controller { get; internal set; }
    }
}