{
  "x402Version": 2,
  "id": 36255,
  "slug": "36255",
  "resource": "https://api.thetruthpal.com/v1/verify",
  "description": "Check whether a supplied public source supports or contradicts a factual claim. Validate citations in AI-generated answers against the supplied URL. TruthPal returns source-grounded evidence and a supported, contradicted, or uncertain verdict; when the source is insufficient, the result is uncertain. It assesses only the supplied source and does not independently corroborate the claim.",
  "type": "http",
  "serviceName": "TruthPal",
  "resourceType": "AI Inference",
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      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xc33D5a8f0372B806167Cd4A52fffb230d52FDcf0",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "20000",
      "amountUsd": 0.02,
      "maxTimeoutSeconds": 300
    }
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  "outputSchema": {
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          "confidence": {
            "maximum": 1,
            "minimum": 0,
            "type": "number"
          },
          "contradicting_evidence": {
            "items": {
              "type": "string"
            },
            "type": "array"
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          "evidence": {
            "items": {
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            "type": "array"
          },
          "reasoning": {
            "type": "string"
          },
          "source_freshness": {
            "enum": [
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              "dated",
              "unknown"
            ],
            "type": "string"
          },
          "supporting_evidence": {
            "items": {
              "type": "string"
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            "type": "array"
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          "verdict": {
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              "contradicted",
              "uncertain"
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  "extensions": {
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          "body": {
            "claim": "The Moon formed several billion years ago",
            "source_url": "https://science.nasa.gov/moon/facts/"
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
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            "evidence": [
              "The source states that the Moon formed about 4.5 billion years ago."
            ],
            "reasoning": "The source directly supports the claim that the Moon formed several billion years ago.",
            "source_freshness": "current",
            "supporting_evidence": [
              "The source states that the Moon formed about 4.5 billion years ago."
            ],
            "verdict": "supported"
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          "type": "json"
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            "additionalProperties": false,
            "properties": {
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                    "maxLength": 2000,
                    "minLength": 5,
                    "type": "string"
                  },
                  "source_url": {
                    "description": "The credential-free public HTTP or HTTPS source containing the evidence to evaluate.",
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                    "pattern": "^[Hh][Tt][Tt][Pp][Ss]?://",
                    "type": "string"
                  }
                },
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                    "minimum": 0,
                    "type": "number"
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                    "items": {
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                    "type": "array"
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                  "evidence": {
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                    "type": "string"
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                      "contradicted",
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                    "type": "string"
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                  "evidence",
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            "type": "object"
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        "required": [
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  },
  "tags": [
    "Source verification",
    "Citation checking",
    "Evidence verification",
    "Fact checking",
    "Claim verification",
    "bazaar"
  ],
  "sourceHost": "api.thetruthpal.com",
  "lastUpdated": "2026-10-11T07:52:00.672Z",
  "quality": {
    "calls30d": 10,
    "uniquePayers30d": 4,
    "lastCalledAt": "2026-10-11T07:52:00.178Z"
  },
  "metadata": {
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    "extensions": {
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              "claim": "The Moon formed several billion years ago",
              "source_url": "https://science.nasa.gov/moon/facts/"
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              "evidence": [
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              ],
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              "source_freshness": "current",
              "supporting_evidence": [
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              "verdict": "supported"
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                    },
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  "verified": false,
  "featured": false,
  "provider": {
    "host": "api.thetruthpal.com",
    "manifest_name": "api.thetruthpal.com",
    "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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}