It is not easy to develop RESTful web service that support exposing data in a variety representation media types, and abstract away the low level details of client-server communications without a good toolkit. A standard and portable JAX RS API was designed to simplify the development and deployment of RESTful web service clients and services in Java. Jersey RESTful Web Services 3. x Framework is an open source, production-quality framework that supports Jakarta RESTful Web Services 3.0. Jersey framework is much more than JAX-RS's reference implementation. Jersey's API extends JAXRS with new features. GlassFish will continue to track the JAX-RS API, and release regular releases of production-quality reference implementations. APIs are provided to extend Jersey and build a community. It makes it easy to create RESTful Web Services using Java and the Java Virtual Machine.