You must have an AirMap Developer account to use the AirMap Map JS SDK. If you do not have an account, sign up for one at the AirMap Developer Portal.
Since the AirMap Map SDK is built on top of Mapbox, you must also have a Mapbox API Key. You can sign up for a Mapbox API Key here .
The Contextual Airspace plugin is open-source and available from a variety of sources:
Updated about a year ago
Learn to use the tile server