For agents & developers

Plug an agent in

TinyDock is an MCP server with two tools. run_code runs a program and returns stdout. serve leases a live public URL for a few minutes. Either way the agent gets HTTP 402, pays one cent from its own wallet, and nobody signs up for anything. The sandbox has no outbound network — not even DNS — so leased pages can answer visitors and reach nothing. A URL an agent can buy, because it can't sign up for one.

Point any MCP client at /api/mcp over streamable HTTP and it will see run_code — but speaking MCP is not enough to call it. The caller must also speak x402: read the challenge, sign it, replay the request. Ninety lines, and no gas token — here is a working client.

Free plays run in real Firecracker microVMs, including the one that tries to reach the internet and can't. There is a cheat code on this page.