A simple web service build on Ruby 2.0, Rails 4.0.2 for testing and educational purposes available online at: [Heroku rails-api] (http://rails-api.herokuapp.com/).
Rails-api offers a simple web front end to manage a basic clients list, also it brings the capability to respond in JSON format to other application interface simply by accessing through [Heroku rails-api URI] (http://rails-api.herokuapp.com/clients/1.json) or download a copy of the code and run it locally.
To see a sample project on how to consume the JSON resource, refer to AndroidRestClient project available at [AndroidRestClient] (https://github.com/MOctavio/AndroidRestClient) project available on GitHub.