There are several options for how to start using the DoubleClick Search API.
The one-minute experience: APIs Explorer
To play around and see what the API can do, without writing any code, visit the APIs Explorer. Instant gratification!
The one-hour experience: Your First App
To get up and running, follow the instructions in Your First App.
If you already understand the basics and there are specific things you want to do, see the guides that are listed in the navigation pane on the left.
To look up a particular resource type or method, see the Reference.