Step 1: Add gem 'grape'

bundle install

Step 2: Add

	config.paths.add 'app/api', glob: '**/*.rb'
	config.autoload_paths += Dir["#{Rails.root}/app/api/*"]

to config/application.rb

Step 3: Create folder app/api

Create folder app/api/v1

		Create file app/api/v1/user_api.rd

Create file root_v1.rb in app/api

Step 4:

Change routes.rb

Ex: link for v1: /api/v1/users