You have the ability to test all your api routes that delcared in config/routes.rb.
Within the namespace :api.
These docs are set like Swagger however do not require any extra configuration.
The javascript for all your routes are generated with the config/initializers/api_documentation_js.rb
The generate js file method is in this initializer.
Rack Cors is setup as well in your initializer for cors in path config/initializers/cors.rb