{
  "service": "walletcheck",
  "what": "Base mainnet wallet hygiene check: outstanding ERC-20/ERC-721 approvals, operator grants, activity summary and a hygiene score, straight from public RPC.",
  "paid_endpoint": "GET /checks?address=0x...&range_blocks=100000 (price via x402, $0.01)",
  "free_endpoints": [
    "GET /",
    "GET /health"
  ],
  "input_example": {
    "address": "0x4200000000000000000000000000000000000006",
    "range_blocks": 100000
  },
  "limits": "Base mainnet only; default window last 100000 blocks (~2 days); best-effort on public RPC.",
  "payer_headers": [
    "X-Payment-Payer",
    "X-Payment-Amount"
  ]
}