After 'mix phx.gen.json Items Item items name:string description:string info:string amount:integer factor:float type:string --no-context --no-schema'.

lib/generic_rest_server_web/router.ex

@@ -24,9 +24,11 @@ defmodule GenericRestServerWeb.Router do
   end
 
   # Other scopes may use custom stacks.
-  # scope "/api", GenericRestServerWeb do
-  #   pipe_through :api
-  # end
+  scope "/api", GenericRestServerWeb do
+    pipe_through :api
+
+    resources "/items", ItemController, except: [:new, :edit]
+  end
 
   # Enable LiveDashboard and Swoosh mailbox preview in development
   if Application.compile_env(:generic_rest_server, :dev_routes) do