InstaBox: Free Cloud Sandboxes for AI Agents — Honest Notes After a Week of Testing

Description and use

InstaBox offers a free cloud sandbox for AI agents, enabling browser automation and network experiments with persistent storage, but is limited by idle pause, max 8‑hour runs, and no public IPv4.

Problem

Running AI agent browser automation locally limits persistence, scalability, and remote accessibility.

Outcome

InstaBox provides a free, persistent cloud sandbox for AI agents, enabling browser automation and network experiments without local machine constraints, though it is limited to short-term use and lacks public inbound IPs.

Workflow

• 1. Join the InstaBox beta and activate the Free plan.
• 2. Spin up to 5 machines (4 vCPU / 8 GiB RAM / 20 GiB disk each).
• 3. Deploy AI agent code to the machine.
• 4. Use the provided HTTPS links or SSH gateway to interact with services.
• 5. Let the machine pause after ~30 minutes idle or stop after ~8 hours continuous run.

Evidence

InstaBox (instabox.sh), built by InsForge, is a cloud sandbox service made for AI agents — instead of running agent browser/automation work on your own machine, you spin up cloud machines and let the agent work there.

Source

Up to 5 machines; the agent-browser template is 4 vCPU / 8 GiB RAM / 20 GiB disk per machine

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Files live on a persistent volume and survive pause, shutdown and reboot (only deleting the machine wipes them)

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Machines auto-pause after ~30 minutes idle, and there is a max continuous run of ~8 hours — it is a workbench, not a 24/7 server

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As a free workbench for AI-agent experiments, I have not found anything else like it.

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