Fly.io developer documentation
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Apps on Fly.io
Fly Launch is app configuration, provisioning, deployment, scaling, and orchestration with our flyctl CLI.
Work with your apps: create, configure, deploy, and scale with Fly Launch, set secrets, and prepare for production
flyctl CLI
Use the fly command to create and deploy apps, control individual Machines, configure networking, and more.
Install flyctl
flyctl is open source
Fly Machines
Machines are fast-launching VMs—and the compute engine of the Fly.io platform.
Learn all about Fly Machines
Machines API
Get precise, low-level control of Machines with our REST API.
GPU compute
Run GPU workloads on Fly Machines.
Supporting services
Services from Fly.io and our extension partners to help you run your entire stack near your users.
Supabase Postgres (public alpha)
Networking
Private networking, public services, custom domains, routing, and load balancing.
Networking on Fly.io
Monitoring
Explore built-in and custom Prometheus metrics and Grafana dashboards. Live tail and search your app’s logs, or ship them where you want them.
Security
Built-in security and partner extensions.
Security on the Fly.io platform
Application security by Arcjet for JavaScript apps