We have two public APIs actually:
- The GraphQL API. Check out our Playground with Docs
- Machines API to spin VMs programmatically. See docs
I really feel like you need machines! We talk more about it here: Fly Machines: an API for fast-booting VMs · Fly
Thought I must say GraphQL is prone to changes so stay tuned on the Playground to be up to date with our format.