Checkout — pay with MetaMask (x402)
Pay in USDC on Base via your MetaMask wallet — no Stripe, no card, crypto-native. Estate-signed report unlocked on settlement.
| Product | Price (USDC) | Action |
|---|---|---|
| Model measurement report | $5 | Request (402) |
| Regulator gap memo | $49 | Request (402) |
| Estate method license | $499 | Request (402) |
Click a product → the API returns 402 Payment Required with an x402 payment request (USDC, recipient, chainId, nonce, expiry). Settle it from MetaMask, then /verify/{plan} returns the estate-signed report.
Production note: the receiving address is X402_PAY_TO (your MetaMask/estate wallet). Until configured, the endpoint answers 402 honestly with "payment receiving address not configured".