LinkRest is not an automated engine to take your DB online with a single command. You still have to write code for JAX-RS endpoints (however simple and trivial that code might end up being). Having this code around allows you to customize processing, implement security around endpoints, hide certain methods, etc. This is a defensive approach that goes a long way to avoid unintended consequences when opening up your data on the web.
Having said that, such an engine can be written on top of LinkRest with relative ease.