Check answer
check_answerRead-onlyIdempotent
Fact-check a whole answer: extracts every checkable claim and verifies each one against public Wikipedia sources, returning a verdict, confidence, quote and source URL per claim plus suggested next actions. Use it to audit chatbot or RAG output before showing it to a user. Price: $1.00 USDC on Base per call via x402; this MCP call returns payment instructions and the paid HTTP route POST /v1/check_answer returns the per-claim results. Read-only.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| answer | Yes | The full answer text to fact-check. Each factual sentence is checked separately. |
Output Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| tool | Yes | Tool name. | |
| result | No | Paid result: { result_id, mode, claims: [{ text, verdict, confidence, citations[] }], next_actions, 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. |