@mudyc The routes in cowboy_router are set for all apps. They setup the paths for the system. The routes in the routes module are optional, but used to control specific routes for specific pages in your site. If you do not set a route module like that in sys.config, then the system will match based on the names of the modules dynamically. The routs module is an extension of the cowboy_router and should manage the n2o_stream and n2o_cowboy endpoints.