Good news, the "R" in REST does not stand for rebuild. It is possible to start creating an API for your code that might not require huge rewrites or even large changes. First, we will use CommandBox and Host Updater to build a local environment where you can run multiple sites on your local machine – one “front end� and the other our API. We’ll briefly look at some existing code to get our bearings, install ColdBox and then "connect" it to our code. Concepts covered will primarily consist of routes, handlers and to a lesser extent, modules.