Live Listing Proof

{
  "protocolVersion": "1.0",
  "name": "Live Listing Proof",
  "description": "Verify a public product, classified, marketplace or auction listing immediately before an agent relies on or recommends it. Returns source-supported listing facts when retrievable, and explicit removed, blocked, unreachable, unsupported or insufficient-evidence states instead of inventing facts.",
  "author": "Matthew Skowron",
  "wellKnownURI": "https://live-listing-proof.mattskowronis.workers.dev/.well-known/agent-card.json",
  "url": "https://live-listing-proof.mattskowronis.workers.dev/a2a",
  "version": "1.3.0",
  "provider": {
    "organization": "Matthew Skowron",
    "url": "https://live-listing-proof.mattskowronis.workers.dev/"
  },
  "documentationUrl": "https://live-listing-proof.mattskowronis.workers.dev/openapi.json",
  "iconUrl": null,
  "supportsAuthenticatedExtendedCard": false,
  "security": [
    {
      "x402": []
    }
  ],
  "securitySchemes": {
    "x402": {
      "in": "header",
      "name": "PAYMENT-SIGNATURE",
      "type": "apiKey",
      "description": "x402 exact scheme, $0.02 USDC on eip155:8453"
    }
  },
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false,
    "extensions": null
  },
  "defaultInputModes": [
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "skills": [
    {
      "id": "verify_public_listing",
      "name": "Verify Public Listing",
      "description": "Verify a public product, classified, marketplace or auction listing and return supported listing facts plus machine-readable source/listing state.",
      "tags": [
        "listing-verification",
        "marketplace",
        "classifieds",
        "auction",
        "price-check",
        "listing-freshness"
      ],
      "examples": [
        "Verify this marketplace listing is still available before recommending it.",
        "Confirm the advertised price on this classified ad.",
        "Check whether this auction listing was removed.",
        "Validate listing facts before citing the source."
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ]
    }
  ],
  "conformance": true,
  "conformance_errors": null,
  "homepage": null,
  "repository": null,
  "license": null,
  "pricing": null,
  "contact": null,
  "id": "f3e427aa-298b-4348-b9cb-504f0c2c1fb0"
}