dvcrn 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
| Verdict | Confidence | What to do |
|---|---|---|
confirmed |
> 0.9 | Safe to use. Cite current_truth as the verified value. |
confirmed |
0.7-0.9 | Likely correct but note the uncertainty to the user. |
stale |
any | The claim WAS true but data has changed. Use current_truth instead. Tell the user: "That was previously correct, but the current value is X." |
disputed |
any | Sources disagree. Present both sides — do NOT pick one. Say: "Sources conflict on this — [source A] says X while [source B] says Y." |
false |
> 0.8 | Contradicts current data. Correct it: "Actually, the current value is X." |
false |
< 0.8 | Likely wrong but not certain. Flag it: "This doesn't match current data (X), but confidence is moderate." |
unknown |
any | Could not verify. Say so honestly — do NOT guess. |
Step 5: Act on the result
- In calculations: always substitute
current_truthfor 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 pricesentity— company info, population, founding datesgeo— timezones, geographic datafactcheck— 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.