So I’ve purchased Navigraph data. Is there any way I can download Waypoint/Airport data directly from Navigraph in a particular application I want to build?
You can download and checkout the various data formats at FMS Downloads whilst your subscription is active.
From Support page :
If you are a developer, and would like to know how to integrate with Navigraph resources, please write us on firstname.lastname@example.org. We really appreciate short and concise emails. Thank you!