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Claim Verify
x402
Claim Verify is a paid API for AI agents from claim-verify.agentutil.net, paid per call via x402, $0.001000/call, status unknown (last checked 2026-09-14).
Verifies factual claims against live data to confirm accuracy before using them in responses, calculations, or decisions
Price / call$0.001000
Success—
StatusUnknown
How this service works
Verify factual claims against live data before using them in responses, calculations, or decisions.
Output
Returns a verification result indicating whether the submitted factual claim is accurate or inaccurate, potentially including supporting evidence, a confidence score, and relevant sourced data used to assess the claim.
Example use cases
Example prompt
“Before I use this in my answer, can you verify whether the claim 'the Eiffel Tower is 330 meters tall' is actually accurate according to live data?”
Technical details
Endpoint
POSThttps://claim-verify.agentutil.net/v1/skillWhen to prefer
Use this endpoint when an AI agent needs to confirm the factual accuracy of a specific claim before incorporating it into a response, calculation, report, or decision — especially when the cost of acting on incorrect information is high. Prefer this over general search when you need a binary or scored verification result rather than raw search results.
Side effects
- Ambiguous or poorly formed claim may result in inconclusive verification
- Live data sources unavailable may cause lookup failure
- Claim too subjective or opinion-based to verify factually
- Rate limits or payment failure may block the request
- Highly niche or obscure claims may lack sufficient data to verify
Input
{
"name": "claim-verify"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| name | string | Skill name |
Output
{
"name": "claim-verify",
"content": "# verify-claim\n\nVerify factual claims against live data before using them in responses, calculations, or decisions. Returns structured verdicts with confidence scores and current truth values.\n\n## When to Activate\n\nUse this skill whenever:\n\n- A user states a number as fact (\"the exchange rate is 0.92\", \"Bitcoin is at $60K\")\n- You are about to use training-data numbers in calculations or recommendations\n- A user asks \"is it true that...\" or \"can you verify...\"\n- You need a current price, rate, date, or statistic for an accurate response\n\n**Do NOT use for:** opinions, predictions, subjective claims, or questions about future events.\n\n## Workflow\n\n### Step 1: Extract the claim\n\nIdentify the specific factual assertion. Be precise.\n\n### Step 2: Check via MCP tool (preferred)\n\nIf `@agentutil/verify-mcp` is available:\n```\nverify_claim({ claim: \"The USD to EUR exchange rate is 0.92\" })\n```\n\n### Step 3: Fall back to HTTP\n\n```bash\ncurl -X POST https://verify.agentutil.net/v1/verify \\\n -H \"Content-Type: application/json\" \\\n -d '{\"claim\": \"The USD to EUR exchange rate is 0.92\"}'\n```\n\n### Step 4: Interpret the verdict\n\n| Verdict | Confidence | What to do |\n|---------|------------|------------|\n| `confirmed` | > 0.9 | Safe to use. Cite `current_truth` as the verified value. |\n| `confirmed` | 0.7-0.9 | Likely correct but note the uncertainty. |\n| `stale` | any | Data has changed. Use `current_truth` instead. |\n| `disputed` | any | Sources disagree. Present both sides. |\n| `false` | > 0.8 | Contradicts current data. Correct it. |\n| `unknown` | any | Could not verify. Say so honestly. |\n\n## Categories\n\n- `financial` — exchange rates, crypto prices, stock prices\n- `entity` — company info, population, founding dates\n- `geo` — timezones, geographic data\n- `factcheck` — general fact-checking\n\n## Pricing\n\n- Free tier: 25 queries/day, no authentication required\n- Paid tier: $0.004/query via x402 (USDC on Base)\n\n## Agent Discovery\n\n- MCP server: `@agentutil/verify-mcp` (npm)\n- ClawHub: `clawhub install claim-verify`\n- Agent Card: https://verify.agentutil.net/.well-known/agent.json",
"install": "clawhub install claim-verify",
"service": "https://claim-verify.agentutil.net",
"version": "2.0.1",
"services": [
"verify.agentutil.net"
],
"request_id": "9a5a5f9d-767e-4b3e-8898-83371ffcbad8",
"description": "Verify factual claims against live data before using them in responses, calculations, or decisions.",
"display_name": "Verify Claim"
}Tags
x402
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