{"uid":"cap_mTD6yDI3mQL_oSgWv-8F9","slug":"canon-fact-verification-api-a94bcae3","name":"Canon Fact-Verification API","description":"Fact-checking and academic research for AI agents. Verify claims, search papers, explore journals. USDC on Base.","url":"https://tascanon.orbonomy.xyz/api/verify","method":"POST","headers":{},"bodySchema":{"type":"object","required":["lang","claim"],"properties":{"lang":{"type":"string"},"claim":{"type":"string"}}},"responseSchema":{"type":"object","properties":{"success":{"type":"boolean"}}},"example":{"request":{"lang":"en","claim":"The Great Wall of China is visible from space with the naked eye"},"response":{"sources":[],"success":true,"verdict":"unverified","raw_data":{"wikidata":[],"factcheck":[],"wikipedia":null},"key_facts":[],"confidence":0,"explanation":"No supporting evidence found in available sources."}},"exampleRequest":{"lang":"en","claim":"The Great Wall of China is visible from space with the naked eye"},"tags":["x402"],"displayCostAmount":"0.1","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_k1C0IDZQO23SXLPh-mMys","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies a textual claim using fact-checking and academic research sources, returning a structured verdict","exampleAgentPrompt":"Can you fact-check this claim for me in English: 'The Great Wall of China is visible from space with the naked eye'?","exampleUseCases":null,"resultDescription":"A JSON object with a 'success' boolean field indicating whether the claim was successfully processed and verified; in practice expected to also carry verdict details about whether the claim holds up against academic and factual sources.","failureModes":["Missing required 'claim' field returns validation error","Missing required 'lang' field returns validation error","Unsupported language code may result in an error or degraded result","Payment failure (insufficient USDC) returns HTTP 402","Ambiguous or overly short claims may yield low-confidence results","Network timeout for complex multi-source lookups"],"whenToPreferThis":"Use Canon when an AI agent needs to verify specific factual claims against academic and authoritative sources, especially for scientific, historical, or statistical assertions. Prefer this over general web search when you need a structured true/false verdict backed by research rather than a list of links.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:42:37.758Z","isFirstParty":false}