I was having a problem when developing a Web Api 2 project with Owin: help page were not generated as I expected. I followed the tutorial Creating Help Pages for ASP.NET Web API and yet, it was missing something to get it working with OWIN and KATANA.

Searching through the internet I found this answer on StackOverflow: Can’t get ASP.NET Web API 2 Help pages working when using Owin.

The solution is simple:

• On OWIN Startup.cs or equivalent file, expose HttpConfiguration and register the help page area with AreaRegistration.RegisterAllAreas():

   public class Startup 
   { 
       public static HttpConfiguration HttpConfiguration { get; private set; } 
       public void Configuration(IAppBuilder app) 
       { 
           HttpConfiguration = new HttpConfiguration();
    	   AreaRegistration.RegisterAllAreas(); 
    	   WebApiConfig.Register(HttpConfiguration);
    	   app.UseWebApi(HttpConfiguration); 
        } 
   } 
  

• Replace all the GlobalConfiguration.Configuration with Startup.HttpConfiguration, in my case, only in HelpPageAreaRegistration.RegisterArea and in HelpController constructor.