Free to try · No signup · No card

Your AI agent builds you a real app. Right now.

Copy one prompt. Paste it into the AI tool you already use. A few minutes later it hands you a live link you can open and share.

The prompt · copy this

Please build me a demo using the Run402 CLI. Start with run402.com/llms.txt and its complete app files.

Then switch to your AI tool, paste, and press enter. That’s the whole setup.

Copy

One prompt. It tells your agent everything it needs to know.

Paste

Into the chat of whatever AI tool you build with. Press enter.

Watch

Your agent reads the docs, builds the app, and posts a live URL back to you.

Free to try

The demo runs on the free prototype tier. $0. No card, and nothing for you to sign up for.

Hard caps, always

Your agent can only spend what you allow. Hard limits, no overages, never a surprise bill.

Cleans up after itself

The demo never expires and costs nothing to keep. Nothing to cancel, nothing to uninstall.

Works with the AI tools you already use:

Claude Code·Cursor·Lovable·Bolt.new·Replit·any agent that reads a link

If the prompt shows a promo code, your agent gets $1 of allowance on us. Codes stay fresh for about an hour, so use the prompt soon after copying (or just copy it again). Curious what your agent will read? The docs are public: run402.com/llms-cli.txt. Want the full picture first? The product page has everything.