Pay with x402

Human checkout lives in the marketplace. Machine clients use the payment API.

• $0.05 canary in marketplace
• Unlock LVL Agent Revenue OS Pack — $49 USDC on Base
• $49 flagship in marketplace UI
• GET /api/pay?skill=… → HTTP 402 challenge
• Docs quickstart · llms.txt

After transfer, complete activation (POST X-PAYMENT) so the sealed pack unlocks.

Crypto payments are optional product purchases — not investment advice.