{"id":293528,"recorded_at":"2026-10-26T21:17:27.375395Z","observed_at":"2026-10-26T21:17:27.375308Z","subject_kind":"endpoint","subject":"c81fcd5f-2788-4f3f-85cd-5fa3e64242ea","kind":"mcp.tools","method":"probe.mcp/1","body":{"count":4,"tools":[{"description":"Fact-check a whole answer: extracts every checkable claim and verifies each against Wikipedia, plus Wikidata structured facts for dates, numbers, quantities, ordinals and records. Returns per-claim verdict, confidence, quote, source URL, sentence span and suggested_correction (quoted only from cited sources when contradicted/outdated), plus an answer-level summary with overall_verdict, counts and problem_sentences. Abstained rather than guessed. Use to audit chatbot or RAG output. Price: $1.00 USDC on Base per call via x402; this MCP call returns payment instructions and POST /v1/check_answer returns the results. 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When given, no fetch is made.","maxLength":20000,"minLength":1,"type":"string"},"title":{"description":"Optional title shown in citations.","maxLength":200,"type":"string"},"url":{"description":"Public https URL. Fetched with a 3.5 s timeout and a 512 KB cap; http, file and other schemes, private / loopback / link-local / metadata addresses, IP-literal hosts, custom ports and URLs with credentials are rejected (HTTP 400, not charged). With text, it is only the citation link.","format":"uri","maxLength":2048,"type":"string"}},"type":"object"},"maxItems":10,"type":"array"},"sources_only":{"default":false,"description":"Optional. true = judge the claim only against your sources (no public-source lookups). Needs a non-empty sources array.","type":"boolean"}},"required":["answer"],"type":"object"},"name":"check_answer"},{"description":"Use when a claim is high-stakes, or when check_answer or extract_claims marks it unsure (their next_step gives the exact request). Verifies up to three claims against Wikipedia, Wikidata, Google News, Europe PMC, FRED and SEC EDGAR; returns verdict, confidence, evidence for and against with URLs, and flags contradictions. Async: poll GET /v1/jobs/{job_id} free. $0.75 USDC on Base via x402. Read-only.","inputSchema":{"additionalProperties":false,"properties":{"answer":{"description":"The claim or short text to verify (up to three claims are checked).","examples":["US unemployment was 3.7% in December 2023."],"minLength":1,"type":"string"},"sources":{"description":"Optional. Up to 10 sources of your own, used as extra evidence next to the public sources and cited with provider and source_type \"caller\". The response lists what was used in sources_used.","items":{"additionalProperties":false,"anyOf":[{"required":["url"]},{"required":["text"]}],"description":"One source: {url} for a public https page we fetch, or {text, title?, url?} for text you already have.","properties":{"text":{"description":"Source text to check the claim against (up to 20,000 characters). When given, no fetch is made.","maxLength":20000,"minLength":1,"type":"string"},"title":{"description":"Optional title shown in citations.","maxLength":200,"type":"string"},"url":{"description":"Public https URL. Fetched with a 3.5 s timeout and a 512 KB cap; http, file and other schemes, private / loopback / link-local / metadata addresses, IP-literal hosts, custom ports and URLs with credentials are rejected (HTTP 400, not charged). With text, it is only the citation link.","format":"uri","maxLength":2048,"type":"string"}},"type":"object"},"maxItems":10,"type":"array"},"sources_only":{"default":false,"description":"Optional. true = judge the claim only against your sources (no public-source lookups). Needs a non-empty sources array.","type":"boolean"}},"required":["answer"],"type":"object"},"name":"deep_verify"},{"description":"Split a text (for example an AI-generated answer) into atomic factual claims. Each claim includes span, grounding_required, claim_type (number|date|quantity|quote|named_entity_fact|comparison|opinion|prediction|other), check_worthiness (high|medium|low), and the source sentence. Hedges are stripped, pronouns are resolved across sentences, and compound sentences are split. Questions, greetings, opinions and predictions are marked grounding_required false. Use before verify_claim. Price: $0.05 USDC on Base per call via x402; this MCP call returns payment instructions and POST /v1/extract_claims returns the claims. Read-only.","inputSchema":{"additionalProperties":false,"properties":{"text":{"description":"The text to split into claims, for example a chatbot answer. Up to a few thousand characters.","examples":["The Eiffel Tower is in Paris and was completed in 1889."],"minLength":1,"type":"string"}},"required":["text"],"type":"object"},"name":"extract_claims"},{"description":"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. 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Fetched with a 3.5 s timeout and a 512 KB cap; http, file and other schemes, private / loopback / link-local / metadata addresses, IP-literal hosts, custom ports and URLs with credentials are rejected (HTTP 400, not charged). With text, it is only the citation link.","format":"uri","maxLength":2048,"type":"string"}},"type":"object"},"maxItems":10,"type":"array"},"sources_only":{"default":false,"description":"Optional. true = judge the claim only against your sources (no public-source lookups). 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