{
  "skill_id": "oracle-onchain-verify",
  "name": "On-Chain Verification Oracle",
  "evaluation": "free",
  "quality": "agent-decision-grade",
  "price_usd": 0.1,
  "category": "Oracle",
  "tier": "starter",
  "tags": [
    "oracle",
    "on-chain",
    "base",
    "x402",
    "esp",
    "verification",
    "p0",
    "kind:oracle",
    "depth:outline_only",
    "demoted-default"
  ],
  "summary": "Read Base state: verify txs, balances, gas, and contract storage. Returns sealed proof packages any agent can re-verify independently.",
  "when_to_use": [
    "Confirm a Base payment landed",
    "Need balance or storage proof before acting",
    "Hand another agent a re-verifiable chain proof pack"
  ],
  "outline": [
    "Free outline + sample query",
    "POST /api/oracles/oracle-onchain-verify/eval (free sample)",
    "GET challenge → pay USDC on Base",
    "POST settle → sealed attested result + proof ledger"
  ],
  "capabilities": [
    "eth_getTransactionReceipt multi-RPC verification",
    "USDC/USDbC Transfer log scan",
    "ETH and ERC-20 balances",
    "Contract storage slots",
    "Sealed content-addressed result pack"
  ],
  "decision_criteria": [
    "You need this when: Confirm a Base payment landed",
    "You get capability: eth_getTransactionReceipt multi-RPC verification",
    "Budget fits: full unlock is $0.1 USDC on Base",
    "You can automate unlock via HTTP 402 without a browser",
    "You only need teaser/outline first — sealed src/ops stay locked until payment"
  ],
  "sealed_after_pay": [
    "SKILL.md (teaser public)",
    "agent-install.json (public meta)",
    "src/index.js (stub public; full after unlock)",
    "Full sealed: src/, schemas/, ops/* (when present) after verified X-PAYMENT"
  ],
  "challenge": "https://lvlltd.com/api/pay?skill=oracle-onchain-verify",
  "sample": "https://lvlltd.com/skills/oracle-onchain-verify/sample.md",
  "pack_meta": "https://lvlltd.com/api/packs?skill=oracle-onchain-verify",
  "teaser": "https://lvlltd.com/sealed/oracle-onchain-verify/",
  "proof": "https://lvlltd.com/api/proof",
  "standards": [
    "x402",
    "ERC-7857"
  ],
  "buy_agent": [
    "GET /skills/oracle-onchain-verify/outline.json",
    "GET /api/pay?skill=oracle-onchain-verify",
    "Settle USDC on Base to payTo",
    "POST /api/pay with X-PAYMENT {\"txHash\",\"skill\"}"
  ]
}