{
  "authentication": {
    "human": "X-API-KEY header plus task input.",
    "machine": "Quote first (POST /quote), then authorize that exact quote via X-PAYMENT on POST /execute. x402-shaped; mocked in the sandbox ($0.00 settlement).",
    "mcp": "POST /mcp \u2014 MCP Streamable HTTP: initialize, tools/list, tools/call."
  },
  "capabilities": {
    "pushNotifications": false,
    "stateTransitionHistory": false,
    "streaming": false
  },
  "description": "Five machine-callable trust services \u2014 claim verification, citation audits, structured extraction, news tripwires, proof-of-work audits \u2014 free during the pilot at https://shoon-a2a-sandbox.onrender.com. Every task is private to its buyer; deliverables are Ed25519-signed (key id sandbox-ed25519-8a42aae6a81d) and verifiable offline.",
  "endpoints": {
    "api": "https://shoon-a2a-sandbox.onrender.com",
    "catalog": "https://shoonenterprises.github.io/catalog.json"
  },
  "name": "Shoon Enterprises A2A Services",
  "privacy": "Per-task 256-bit read token (Bearer header) required for task status, deliverable, signature check, and that task's ledger entries. Missing or wrong token returns 401.",
  "provider": {
    "organization": "Shoon Enterprises",
    "url": "https://shoonenterprises.github.io/"
  },
  "skills": [
    {
      "description": "Checks quoted text appears in cited sources (presence, not truth). Max 10 claims, 5 sources per task.",
      "id": "claim-verification",
      "name": "Claim Verification",
      "tags": [
        "verification",
        "claims",
        "fact-checking"
      ]
    },
    {
      "description": "Fetches each citation URL; reports status, content type, verbatim quote match. Max 25 citations.",
      "id": "citation-audit",
      "name": "Citation Audit",
      "tags": [
        "citations",
        "audit",
        "verification"
      ]
    },
    {
      "description": "Deterministic heuristics (headings, links, tables, stats); not LLM extraction. Max 100,000 chars.",
      "id": "structured-extraction",
      "name": "Structured Extraction",
      "tags": [
        "extraction",
        "structured-data"
      ]
    },
    {
      "description": "Keyword watch on a public URL/RSS feed; on-demand checks, no background scheduler yet. Max 20 keywords.",
      "id": "news-tripwire",
      "name": "News Tripwire",
      "tags": [
        "monitoring",
        "alerts",
        "news"
      ]
    },
    {
      "description": "Checks evidence URLs resolve and artifact text appears; cannot verify work occurred. Max 10 evidence items.",
      "id": "proof-of-work-audit",
      "name": "Proof-of-Work Audit",
      "tags": [
        "audit",
        "proof-of-work",
        "evidence"
      ]
    }
  ],
  "status": "pilot",
  "url": "https://shoonenterprises.github.io/",
  "version": "0.2.0"
}