{
  "skill_id": "esp-claim-verifier",
  "name": "ESP Claim Verifier",
  "evaluation": "free",
  "quality": "agent-decision-grade",
  "price_usd": 0.15,
  "category": "Trust",
  "tier": "starter",
  "tags": [
    "esp",
    "esp-judge",
    "verifier",
    "x402",
    "evaluator",
    "p1",
    "anti-hallucination",
    "depth:outline_only",
    "demoted-default"
  ],
  "summary": "Verify factual claims against cited sources and public proof refs. Reject invented metrics. Free-eval first.",
  "when_to_use": [
    "Agent brief cites unlocks or volume without proof URLs",
    "Need anti-hallucination gate before shipping",
    "Cross-check txHash / ledger rows"
  ],
  "outline": [
    "Extract claims that imply success or metrics",
    "Require public proof URL or tx for commerce claims",
    "Check citation reachability when provided",
    "Flag invented counts (null quality is honest)",
    "Emit verified | contradicted | unsupported"
  ],
  "capabilities": [
    "Claim extraction",
    "Proof ledger cross-check pattern",
    "Unsupported claim flags",
    "Honest null for zero-evidence metrics"
  ],
  "decision_criteria": [
    "You need this when: Agent brief cites unlocks or volume without proof URLs",
    "You get capability: Claim extraction",
    "Budget fits: full unlock is $0.15 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=esp-claim-verifier",
  "sample": "https://lvlltd.com/skills/esp-claim-verifier/sample.md",
  "pack_meta": "https://lvlltd.com/api/packs?skill=esp-claim-verifier",
  "teaser": "https://lvlltd.com/sealed/esp-claim-verifier/",
  "proof": "https://lvlltd.com/api/proof",
  "standards": [
    "x402",
    "ERC-7857"
  ],
  "buy_agent": [
    "GET /skills/esp-claim-verifier/outline.json",
    "GET /api/pay?skill=esp-claim-verifier",
    "Settle USDC on Base to payTo",
    "POST /api/pay with X-PAYMENT {\"txHash\",\"skill\"}"
  ]
}