If you want to build a REST API server with Scala I put together a project for you to start with. It uses Scala, Scalate, Maven, Jersey, JAX-RS, please feel free to fork it on Github.
Here’s what you have to do:
2) Fork the project
3) git clone YOURNEWPROJECT (for example: git clone firstname.lastname@example.org:feliperazeek/scala-rest.git)
4) mvn jetty:run