Verify claim
verify_claimRead-onlyIdempotent
Check one factual claim against public Wikipedia sources and return a verdict (supported, contradicted, outdated, mixed or insufficient_evidence), a confidence score, a short reason, the supporting quote and the source URL. Says insufficient_evidence instead of guessing. Price: $1.00 USDC on Base per call via x402; this MCP call returns payment instructions and the paid HTTP route POST /v1/verify_claim returns the verdict. For a multi-source check use deep_verify. Read-only.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| claim | Yes | One factual sentence to check. |
Output Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| tool | Yes | Tool name. | |
| result | No | Paid result: { mode, claim: { text, verdict, confidence, rationale_short, citations[] }, why, source, receipt }. | |
| status | Yes | payment_required: pay the HTTP route with x402 to get the result. ok: result is included. | |
| message | Yes | Human-readable summary. | |
| payment | No | Payment instructions. MCP tools/call does not charge or run the paid work; call the HTTP route with x402. |