try using default controller routing

per: https://stormpath.com/blog/5-api-tips-dotnet-core

src/FilterLists.Api/Controllers/ListsController.cs

@@ -3,7 +3,6 @@
 
 namespace FilterLists.Api.Controllers
 {
-    [Route("v1/[controller]")]
     [Produces("application/json")]
     public class ListsController : Controller
     {

src/FilterLists.Api/Startup.cs

@@ -38,7 +38,7 @@ public void Configure(IApplicationBuilder app)
 
             app.UseStaticFiles();
 
-            app.UseMvc();
+            app.UseMvc(routes => { routes.MapRoute("default", "v1/{controller=Default}/{action=Get}/{id?}"); });
         }
     }
 }