Fly.io Machines API

fly.io

A REST API to provision and manage Fly Apps, Fly Machines (Firecracker microVMs), volumes, certificates, and tokens for running containers/VMs in Fly.io regions.

The Fly.io Machines API API uses bearer token authentication; has usage based pricing; offers a free tier (Free trial limits: 2 VM hours, 7 days, 10 machines before adding a payment method). Verified 2026-07-13 with per-field source links.

Cloud & Infrastructure Verified 2026-07-13 medium confidence

Base URL

not documented null

no source

Auth

bearer_token

fly.io ↗

Free tier

Free trial limits: 2 VM hours, 7 days, 10 machines before adding a payment method

fly.io ↗

Pricing model

usage_based

fly.io ↗

Pricing

Pay-as-you-go per organization: running Machines priced by CPU/RAM preset plus ~$5/30 days per GB extra RAM; stopped Machines $0.15/GB rootfs per 30 days; volumes $0.15/GB per month; dedicated IPv4 $2/mo; egress from $0.02/GB. 40% discount with reservations.

fly.io ↗

Rate limits

not documented null

no source

OpenAPI spec

https://docs.machines.dev/

fly.io ↗

MCP server

not documented null

no source