Source Claim Proof

{
  "protocolVersion": "1.0",
  "name": "Source Claim Proof",
  "description": "Verify whether a supplied public source page currently supports one atomic factual claim. Returns supported, contradicted, or insufficient-evidence plus source snippets, or explicit blocked/unreachable/unsupported states. Not a general fact checker or web search.",
  "author": "Matthew Skowron",
  "wellKnownURI": "https://source-claim-proof.mattskowronis.workers.dev/.well-known/agent-card.json",
  "url": "https://source-claim-proof.mattskowronis.workers.dev/a2a",
  "version": "1.0.0",
  "provider": {
    "organization": "Matthew Skowron",
    "url": "https://source-claim-proof.mattskowronis.workers.dev/"
  },
  "documentationUrl": "https://source-claim-proof.mattskowronis.workers.dev/openapi.json",
  "iconUrl": null,
  "supportsAuthenticatedExtendedCard": null,
  "security": [
    {
      "x402": []
    }
  ],
  "securitySchemes": {
    "x402": {
      "in": "header",
      "name": "PAYMENT-SIGNATURE",
      "type": "apiKey",
      "description": "x402 exact scheme, $0.01 USDC on eip155:8453"
    }
  },
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false,
    "extensions": null
  },
  "defaultInputModes": [
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "skills": [
    {
      "id": "verify_source_claim",
      "name": "Verify Source Claim",
      "description": "Check whether a supplied public source currently supports one atomic factual claim. Returns supported, contradicted, or insufficient-evidence plus source snippets.",
      "tags": [
        "claim-verification",
        "source-evidence",
        "citation-check",
        "research-preflight"
      ],
      "examples": [
        "Does this page say admission costs $45?",
        "Confirm the event starts at 7:00 PM on this source.",
        "Check whether this documentation still states a three-year warranty."
      ],
      "inputModes": [],
      "outputModes": []
    }
  ],
  "conformance": false,
  "conformance_errors": [
    "Required field is missing: 'capabilities'."
  ],
  "homepage": null,
  "repository": null,
  "license": null,
  "pricing": null,
  "contact": null,
  "id": "23ac324f-6fac-4c3e-938d-90a8f061469b",
  "category": "trust-safety",
  "category_secondary": null
}