{
  "x402Version": 2,
  "id": 33908,
  "slug": "33908",
  "resource": "https://x402.agentindex.world/fact-check",
  "description": "Fact-check verdict written by Claude Haiku 5.5 (Anthropic) from real web sources: supported/contradicted/mixed/unverifiable, each source with its stance (supports/contradicts/neutral). Answer in a few seconds. Try GET /fact-check/sample.",
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      "network": "eip155:8453",
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      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "20000",
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        "properties": {
          "claim": {
            "type": "string"
          },
          "confidence": {
            "description": "0.0-1.0 confidence in the verdict.",
            "type": "number"
          },
          "sources": {
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                "stance": {
                  "enum": [
                    "supports",
                    "contradicts",
                    "neutral"
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                  "type": "string"
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                "title": {
                  "description": "Source page title, when known."
                },
                "url": {
                  "type": "string"
                }
              },
              "type": "object"
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            "type": "array"
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          "verdict": {
            "description": "'inconclusive' is returned instead of a guess whenever confidence is low or no source clearly supports/contradicts the claim - never a confident-sounding verdict the sources don't actually back up.",
            "enum": [
              "supported",
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              "unverifiable",
              "inconclusive"
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            "type": "string"
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          "x402_receipt": {
            "description": "Billing and provenance receipt for this call.",
            "type": "object"
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        "required": [
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          "verdict",
          "confidence",
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          "body": {
            "claim": "The Eiffel Tower is taller than the Statue of Liberty."
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          "method": "POST",
          "type": "http"
        },
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            "claim": "The Eiffel Tower is taller than the Statue of Liberty.",
            "confidence": 0.92,
            "sources": [
              {
                "stance": "supports",
                "title": "Eiffel Tower Facts",
                "url": "https://example.com/eiffel-tower-facts"
              }
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            "verdict": "supported"
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              "bodyType",
              "body"
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                    "description": "0.0-1.0 confidence in the verdict.",
                    "type": "number"
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                  "sources": {
                    "items": {
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                          "enum": [
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                            "contradicts",
                            "neutral"
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                        "title": {
                          "description": "Source page title, when known."
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                        "url": {
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                    "description": "'inconclusive' is returned instead of a guess whenever confidence is low or no source clearly supports/contradicts the claim - never a confident-sounding verdict the sources don't actually back up.",
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                      "inconclusive"
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                    "type": "object"
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                  "verdict",
                  "confidence",
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    "claim verification",
    "claude",
    "fact checking",
    "sources",
    "bazaar"
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  "sourceHost": "x402.agentindex.world",
  "lastUpdated": "2026-10-12T14:23:06.177Z",
  "quality": {
    "calls30d": 4,
    "uniquePayers30d": 2,
    "lastCalledAt": "2026-10-12T14:23:05.709Z"
  },
  "metadata": {
    "serviceName": "fact-check",
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1790789754/bazaar-icons/fde5dd6af2b2b42f.png",
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            "method": "POST",
            "type": "http"
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              "confidence": 0.92,
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                {
                  "stance": "supports",
                  "title": "Eiffel Tower Facts",
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              "verdict": "supported"
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          "$schema": "https://json-schema.org/draft/2020-12/schema",
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                      "description": "The factual claim to check against live web sources.",
                      "type": "string"
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                      "description": "0.0-1.0 confidence in the verdict.",
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                            "enum": [
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                              "contradicts",
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                    "verdict": {
                      "description": "'inconclusive' is returned instead of a guess whenever confidence is low or no source clearly supports/contradicts the claim - never a confident-sounding verdict the sources don't actually back up.",
                      "enum": [
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                      "description": "Billing and provenance receipt for this call.",
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                    "verdict",
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    "manifest_name": "x402.agentindex.world",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-10-14T01:15:01.050Z"
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    "example": {
      "claim": "string",
      "confidence": 0,
      "sources": [
        {
          "stance": "supports",
          "title": null,
          "url": "string"
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      ],
      "verdict": "supported",
      "x402_receipt": {}
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}