{
  "skill_id": "oracle-on-chain",
  "name": "On-Chain State Oracle",
  "evaluation": "free",
  "quality": "agent-decision-grade",
  "price_usd": 0.01,
  "category": "Trust",
  "tier": "foundation",
  "tags": [
    "oracle",
    "sco",
    "on-chain",
    "base",
    "sealed",
    "challengeable",
    "esp",
    "x402",
    "depth:deep",
    "depth:outline_only",
    "demoted-default"
  ],
  "summary": "SCO sealed oracle for Base chain state (block, fee, finality). Free-eval first; multi-provider canary; challengeable on public ledger.",
  "when_to_use": [
    "Need verifiable chain height / fee snapshot before settlement",
    "Multi-source canary before high-stakes on-chain decisions",
    "Agent requires challengeable sealed proof, not a trusted feed"
  ],
  "outline": [
    "GET /api/sco?op=eval&oracle=oracle-on-chain (free)",
    "POST multi-provider canary",
    "POST consensus on sealed cids",
    "Optional challenge with stake",
    "Reputation from SCO ledger only"
  ],
  "capabilities": [
    "Free outline + sample + ledger reputation",
    "Parallel multi-provider sealed packs",
    "Content-addressed cid + challenge window",
    "Origin proof attachment (on_chain_log)"
  ],
  "decision_criteria": [
    "You need this when: Need verifiable chain height / fee snapshot before settlement",
    "You get capability: Free outline + sample + ledger reputation",
    "Budget fits: full unlock is $0.01 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-on-chain",
  "sample": "https://lvlltd.com/skills/oracle-on-chain/sample.md",
  "pack_meta": "https://lvlltd.com/api/packs?skill=oracle-on-chain",
  "teaser": "https://lvlltd.com/sealed/oracle-on-chain/",
  "proof": "https://lvlltd.com/api/proof",
  "standards": [
    "x402",
    "ERC-7857"
  ],
  "buy_agent": [
    "GET /skills/oracle-on-chain/outline.json",
    "GET /api/pay?skill=oracle-on-chain",
    "Settle USDC on Base to payTo",
    "POST /api/pay with X-PAYMENT {\"txHash\",\"skill\"}"
  ]
}