How do I register to use the APIs? Jeff Moyer April 08, 2019 23:11 Follow Please visit this page: https://developer.flightstats.com/getting-started/ to register for free for a 30-day trial period to evaluate the APIs for your application. Related articles How do I use the Cirium Flex APIs? What is the Flight Features API? What is the Historical Flight Status API? What is a Cirium API and when would I use one? What is a Flight Status Flight ID? Comments 0 comments Article is closed for comments.