opencode, the open-source terminal agent — ready at boot.
git init to first commit in 15 seconds of agent time — the real session on this page. opencode installs and launches itself the first time your sandbox boots, wired to metered tokens through the proxy, or to your own key.
real session · captured live on zipbox.ai · sandbox deleted afteropencode source ↗
How you set up opencode in the cloud
Sign in
Email if you want it simple, a crypto key if you want anonymity. No passwords — every session is cryptographically signed.
Boot opencode
A fresh Firecracker microVM boots and opencode installs and launches itself at first boot. On pay-per-use a metered key is injected; or paste your own key at boot.
It’s live in your browser
A full-root terminal opens in the browser and the box answers at its own zbox.sh subdomain. Pause parks it for free, delete wipes it for good, SSH is optional.
Questions, answered straight
- Do I need an API key to run opencode?
- No. Pick pay-per-use and a metered key is injected when the sandbox boots — tokens are billed to your prepaid balance at cost plus 3%, and the agent works immediately. Or bring your own key at boot and pay your provider direct.
- What does running opencode in the cloud cost?
- $0.0342 per hour while the sandbox runs — about $25 a month left on 24/7 — and $0 while it’s paused. You start with free credit — no card. opencode’s default machine is 2 vCPU · 4 GB RAM · 80 GB disk, and other sizes start at $10/mo.
- What happens when I pause or delete a opencode sandbox?
- Two buttons, honestly: Pause shuts the machine down and parks its disk for free — restore it later and pick up where the agent left off. Delete wipes the whole VM — disk, memory, network — permanently. You only ever pay while it runs.
- Is it safe to let opencode run unattended with full permissions?
- In a sandbox, yes — that’s the point. The box is a hardware-isolated Firecracker microVM with its own kernel and none of your files, keys, or cookies. Close the tab and it keeps working; the blast radius is one disposable machine.
- Can I SSH into the sandbox?
- Optionally. The browser terminal is the default and needs no setup. Add an SSH public key when you boot and you can also connect from your own terminal — same machine, same session.
every agent zipbox boots
opencode, on a machine you can throw away.
One click boots the open-source terminal coding agent on a disposable cloud machine — and you pay only while it runs.