Browser Use Cloud — pay with x402 (crypto wallet)

Browser Use Cloud — pay with x402 (crypto wallet)

This is a scripted flow. Follow the steps in order. x402 only works through the SDK (browser-use-sdk for Python, the browser-use npm package for TS) — there is no browser-use CLI command for it, so every step runs a short SDK script.

How to use this script

• Lines under Say: are spoken to the user word for word. Don't paraphrase, add, or drop anything.
• <like this> inside a Say block is a fill-in — replace it with the real value, keep the rest exact.
• Lines under Ask: use the AskUserQuestion tool. Use the question and option text exactly as written.
• To show an explanation before a question, put it inside the AskUserQuestion question field (it renders above the options). Don't send it as separate chat text before calling the tool — that text gets dropped when the question UI opens. So: explanation + the actual question both go in the question field, in one tool call.
• Lines under Do: are your actions. Don't read them out.
• Track two facts as you go: SETUP (A or B, from Step 1) and MODE (A or B, from Step 2).
• SETUP, MODE, and the Path A/B/C names are internal labels for you only. Never say them to the user. Describe choices in plain words instead (e.g. "top up your account" / "accountless wallet"), never "Mode B" or "Path A".

Step 1 — Open and pick the setup

Ask: (header: Use x402) — put the explanation and the question both in the question field, exactly:

x402 is a protocol from Coinbase that, instead of presenting an API key, allows you to use crypto to pay for API requests. x402 lets you pay Browser Use per request from a crypto wallet with USDC on Base — no signup, API key, or credit card needed, just a wallet. Setup takes a few minutes: get or make a wallet, add funds, save the key in .env, and test it.

How do you want to use x402?

• Just use it — Run Browser Use tasks, paid from your wallet, here in terminal by asking me. I set up the wallet and key.
• Build it in — You're coding an app and want x402 in it. I will help you install the SDK, save the key to your project's .env, and add code.

Do: "Just use it" → SETUP = A. "Build it in" → SETUP = B.

Step 2 — Find the account (check before asking)

Do: Look for an existing Browser Use API key, in this order. Don't say anything yet.

1. BROWSER_USE_API_KEY in the environment
2. a BROWSER_USE_API_KEY= line in ./.env
3. ~/.browser-use/config.json (saved by browser-use cloud login / signup)
4. browser-use doctor output, if the CLI is installed

If no key is found anywhere: