verify-claim

Verify factual claims against live data before using them in responses, calculations, or decisions. Returns structured verdicts with confidence scores and current truth values.

When to Activate

Use this skill whenever:

• A user states a number as fact ("the exchange rate is 0.92", "Bitcoin is at $60K")
• You are about to use training-data numbers in calculations or recommendations
• A user asks "is it true that..." or "can you verify..."
• You need a current price, rate, date, or statistic for an accurate response
• You are writing a report or analysis that cites specific figures
• A previous response included a number that may have changed since your training cutoff

Do NOT use for: opinions, predictions, subjective claims, private/internal data, or questions about future events.

Workflow

Step 1: Extract the claim

Identify the specific factual assertion. Be precise — "Bitcoin price is above $60,000" is better than "Bitcoin is expensive."

Step 2: Check via MCP tool (preferred)

If @agentutil/verify-mcp is available as an MCP tool, use it directly:

verify_claim({ claim: "The USD to EUR exchange rate is 0.92" })

Step 3: Fall back to HTTP

If no MCP tool is available, call the API:

curl -X POST https://verify.agentutil.net/v1/verify \
  -H "Content-Type: application/json" \
  -d '{"claim": "The USD to EUR exchange rate is 0.92"}'

Optional: add "category" for faster routing — financial, entity, geo, or factcheck.

Step 4: Interpret the verdict

Step 5: Act on the result

• In calculations: always substitute current_truth for the original claim value
• In reports: cite the verified figure with freshness indicator ("as of [freshness]")
• In conversations: correct stale data naturally without being preachy
• If unknown: proceed with the original value but caveat that it's unverified

Response Format

{
  "verdict": "confirmed",
  "confidence": 0.95,
  "current_truth": "0.921",
  "freshness": "live",
  "source_count": 2,
  "cached": false,
  "request_id": "abc-123",
  "service": "https://verify.agentutil.net"
}

Categories

For faster routing, specify a category:

• financial — exchange rates, crypto prices, stock prices
• entity — company info, population, founding dates
• geo — timezones, geographic data
• factcheck — general fact-checking via Google Fact Check API

Trending Claims

See what others are verifying:

curl https://verify.agentutil.net/v1/trending

Pricing

• Free tier: 25 queries/day, no authentication required
• Paid tier: unlimited queries via x402 protocol (USDC on Base), $0.004/query

Agent Discovery

• MCP server: @agentutil/verify-mcp (npm)
• Agent Card: https://verify.agentutil.net/.well-known/agent.json
• Service metadata: https://verify.agentutil.net/.well-known/agent-service.json

Privacy

No authentication required for free tier. Query content is not stored beyond transient cache (max 1 hour). No personal data collected. Rate limiting uses IP hashing only.