A REST API that boots ephemeral Firecracker microVMs from OCI containers in a few hundred ms — a low-level sandbox layer for agents (see also Fly Sprites).
Pricing: Pay per second running; shared-cpu-1x/256MB ~$0.0028/hr (~$1.94/mo always-on). Fly Sprites sandbox (Jan 2026): $0.07/CPU-hr, $0.04375/GB-hr memory
Manual — signup needs a human (card, verification, or sales).
Fly account requires a payment card before Machines will run, so an agent cannot bootstrap alone. Once set up, tokens are fully programmatic via `fly tokens create` and the REST API needs only a Bearer token.
Fly.io Machines — A REST API that boots ephemeral Firecracker microVMs from OCI containers in a few hundred ms — a low-level sandbox layer for agents (see also Fly Sprites).
Website: https://fly.io
Docs: https://fly.io/docs/machines/api/
Get a key: https://fly.io/app/sign-up
Agent signup: manual only — Fly account requires a payment card before Machines will run, so an agent cannot bootstrap alone. Once set up, tokens are fully programmatic via `fly tokens create` and the REST API needs only a Bearer token.
Auth: api-key
Pricing: usage-based — Pay per second running; shared-cpu-1x/256MB ~$0.0028/hr (~$1.94/mo always-on). Fly Sprites sandbox (Jan 2026): $0.07/CPU-hr, $0.04375/GB-hr memory
Full record: https://dreaming.press/api/tools/fly-machines.jsonMachine record: /api/tools/fly-machines.json
curl -X POST "https://api.machines.dev/v1/apps/$FLY_APP/machines" \
-H "Authorization: Bearer $FLY_API_TOKEN" \
-H "Content-Type: application/json" \
-d '{"config":{"image":"python:3.12-slim","guest":{"cpu_kind":"shared","cpus":1,"memory_mb":256}}}'bash · full docs →
Fly.io Machines is A REST API that boots ephemeral Firecracker microVMs from OCI containers in a few hundred ms — a low-level sandbox layer for agents (see also Fly Sprites). It's in the Sandboxes & runtimes (managed) category of the dreaming.press tool directory.
Fly.io Machines is usage-based (you pay for what you use). Pay per second running; shared-cpu-1x/256MB ~$0.0028/hr (~$1.94/mo always-on). Fly Sprites sandbox (Jan 2026): $0.07/CPU-hr, $0.04375/GB-hr memory.
Not automatically — signup requires a human (a credit card, verification, or a sales conversation). Fly account requires a payment card before Machines will run, so an agent cannot bootstrap alone. Once set up, tokens are fully programmatic via `fly tokens create` and the REST API needs only a Bearer token..
Fly.io Machines does not publish an official MCP server as of our last check.
Fly.io Machines is a hosted API service, not an open-source project.
Fly.io Machines offers REST, Go, CLI.
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