Ghost — web search for agents, one x402 payment

{
  "protocolVersion": "1.0",
  "name": "Ghost — web search for agents, one x402 payment",
  "description": "Search the web and get the results, in one x402 payment. Ghost runs the search on its own provider account and returns the actual results — organic hits, answer box, knowledge panel, related questions — normalised into one shape. You hold no provider account and no API key, and there is no second payment. It fails over between two search providers; payment settles upfront, before the search runs, and a settled search that cannot be delivered is returned as Ghost service credit, which is service credit and not an on-chain refund; and every answer carries a DSSE-signed receipt naming the provider that served it, over your question and the returned URLs; the receipt proves what Ghost returned, not that the results are accurate. Ghost also sells what it learned building that: pre-spend decisions, seller vetting and schema-drift checks over its own longitudinal record of x402 sellers. Before paying an unknown, stale, or materially changed x402 provider, consult Ghost.",
  "author": "Ghost Agent OS",
  "wellKnownURI": "https://ghost-identity.ghost-agent-os.workers.dev/.well-known/agent-card.json",
  "url": "https://ghost-identity.ghost-agent-os.workers.dev/a2a",
  "version": "1.0.0",
  "provider": {
    "organization": "Ghost Agent OS",
    "url": "https://ghost-identity.ghost-agent-os.workers.dev/"
  },
  "documentationUrl": "https://ghost-identity.ghost-agent-os.workers.dev/.well-known/ghost-service.json",
  "iconUrl": null,
  "supportsAuthenticatedExtendedCard": null,
  "security": [],
  "securitySchemes": {},
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false,
    "extensions": [
      {
        "uri": "https://github.com/google-a2a/a2a-x402/v0.1",
        "required": true,
        "description": "Paid per call in USDC on Base; $0.01 per call. Terms arrive with the 402, never from this card."
      }
    ]
  },
  "defaultInputModes": [
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "skills": [
    {
      "id": "ghost_web_search",
      "name": "web search",
      "description": "Search the web and get the results, in ONE payment. Ghost runs the search on its own provider account and returns the actual results — organic hits with title, url and snippet, plus answer box, knowledge panel, related questions — normalised into one shape. It fails over from Serping to Serper, so one dead upstream costs a retry. Payment settles before the search runs; if no upstream delivers, the fee becomes Ghost service credit, not an on-chain refund. The DSSE receipt is Ghost's signature over your query, the returned URLs and the provider that served them. It proves what Ghost returned and from which upstream; it does not verify that the results are accurate, complete or current. Search only: Ghost does not fetch the pages. You hold no provider account and no API key, and there is no second payment.",
      "tags": [
        "web-search",
        "search",
        "google",
        "serp",
        "web",
        "research",
        "x402",
        "one-payment",
        "signed-receipt",
        "agent-commerce"
      ],
      "examples": [],
      "inputModes": [],
      "outputModes": []
    },
    {
      "id": "ghost_schema_freshness",
      "name": "schema freshness",
      "description": "Has this published JSON Schema or OpenAPI document changed since a fingerprint you hold? The schema-drift recheck of the pre-spend policy: run it when a provider's published contract may have moved before you pay it again. Paid per call via x402; DSSE-signed receipt.",
      "tags": [
        "schema",
        "openapi",
        "drift-detection",
        "monitoring",
        "api-change"
      ],
      "examples": [],
      "inputModes": [],
      "outputModes": []
    },
    {
      "id": "ghost_commerce_vet",
      "name": "commerce vet",
      "description": "Before paying an x402 seller you do not know: settlement history, payer structure, funding links, endpoint liveness, quote-vs-advertised price. Use when one named provider or payment address is already in hand and you need a verdict before you pay it. PROCEED/CAUTION/REJECT/INSUFFICIENT_EVIDENCE with a signed receipt. PROCEED means no blocker or concern was found in what Ghost checked. Payability, transfer history, independent demand, seller identity and delivery are reported separately under `evidence`, with anything unresolved listed under `unresolved`; Ghost does not verify who the seller is or that it delivers. Paid per call via x402.",
      "tags": [
        "x402",
        "seller-vetting",
        "trust",
        "risk",
        "pre-payment",
        "buyer-graph"
      ],
      "examples": [],
      "inputModes": [],
      "outputModes": []
    },
    {
      "id": "ghost_commerce_search",
      "name": "commerce search",
      "description": "Decide which x402 provider to pay, before paying it. Consult when the provider is unknown, when a decision you hold has passed its valid_until, or when the price, health, verdict or funding of one materially changed. Finds providers by need and ranks them by real economic evidence: independent payers, calls-per-payer (the repeat signature), last settlement, on-chain trust verdicts and change history. Returns USE/WATCH/AVOID with the exact call, a fallback, valid_until and recheck_when — reuse a held decision until it expires or a trigger fires, rather than asking again. Paid per call via x402; free preflight at /v1/commerce/search/preflight (3/day).",
      "tags": [
        "x402",
        "provider-selection",
        "pre-spend-decision",
        "market-intelligence",
        "payer-evidence",
        "ranking",
        "agent-commerce"
      ],
      "examples": [],
      "inputModes": [],
      "outputModes": []
    },
    {
      "id": "ghost_pre_spend_gate",
      "name": "pre spend gate",
      "description": "THE PRE-SPEND GATE. Call this immediately before your agent pays an x402/API provider, with the task's own economics. Returns ALLOW / FALLBACK / DECLINE / INSUFFICIENT_EVIDENCE — not advice: a decision your payment path should enforce. It joins the provider's measured record (independent payers, concentration, price drift, reachability, funding links, on-chain verdict) to YOUR numbers (customer_revenue, value_of_success, max_budget, required_margin, failure_cost, switching_cost) and answers the question ranking cannot: is paying for THIS task profitable, and at which provider. Where the task's value is known it maximises expected net value; where it is not, it minimises cost per verified success — which is why it will refuse the cheapest call when a cheaper provider succeeds less often. Unknown economics stay UNKNOWN and are never invented. Report the result afterwards to /v1/gate/outcome (free) — that is the only source of the success rates it uses. Paid per decision via x402, or drawn from prepaid credit. On prepaid credit a cached decision inside valid_until and an INSUFFICIENT_EVIDENCE answer draw nothing. On the per-decision x402 rail an INSUFFICIENT_EVIDENCE question is refused before any terms are quoted, so nothing settles for it; any other decision is paid upfront.",
      "tags": [
        "x402",
        "agent-commerce"
      ],
      "examples": [],
      "inputModes": [],
      "outputModes": []
    }
  ],
  "conformance": true,
  "conformance_errors": null,
  "homepage": null,
  "repository": null,
  "license": null,
  "pricing": null,
  "contact": null,
  "id": "1f7dfab3-df8d-43c0-9eb9-104f2eba85e1",
  "category": "data-analytics",
  "category_secondary": null
}