{
  "id": "add-x402-usdc-checkout",
  "name": "Add x402 USDC Checkout to Your Site",
  "price_usd": 9.99,
  "summary": "Ship the same Base USDC x402 pay \u2192 verify \u2192 sealed unlock pattern LVL runs on lvlltd.com, swarm, and music \u2014 challenge, receipt, and unlock routes without inventing volume.",
  "free": true,
  "evaluation": "Read this outline, then try GET https://lvlltd.com/api/pay?skill=agent-x402-first-buy for a live 402 shape.",
  "steps": [
    "Declare price, payTo, asset (USDC on Base 8453) in a 402 challenge body with x402Version and x402_version",
    "Serve free evaluation (outline/sample) before payment",
    "Accept on-chain USDC transfer to payTo; verify receipt on Base",
    "Unlock sealed payload only after verification; re-download with same tx",
    "Publish proof only from confirmed ledger \u2014 never invent volume"
  ],
  "learn": [
    "https://lvlltd.com/learn/x402-explained/",
    "https://lvlltd.com/learn/agents-buy-skills-http/",
    "https://lvlltd.com/learn/buy-first-skill-metamask/",
    "https://lvlltd.com/learn/on-chain-proof/"
  ],
  "challenge_example": "https://lvlltd.com/api/pay?skill=agent-x402-first-buy",
  "canonical_proof": "https://lvlltd.com/api/proof"
}