{"uid":"cap_YYUJKN1PaaDLI8qDOsVVG","slug":"mapleai-fact-check-5fedc52f","name":"MapleAI Fact Check","description":"14 chat models (GPT + Claude), 7 image models, and Jev structured decisions. Pay per request in USDC on Base with x402.","url":"https://base.mapleai.shop/v1/x/factcheck?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"claim":{"type":"string","maxLength":1000,"description":"The statement to verify"},"days_back":{"type":"integer","default":7,"maximum":30,"minimum":1,"description":"How far back to look"},"max_sources":{"type":"integer","default":6,"maximum":10,"minimum":1,"description":"Max evidence items per side; drives the price"}}},"responseSchema":{"type":"json","example":{"claim":"...","object":"x.factcheck","summary":"...","verdict":"confirmed","confidence":"high","evidence_for":[{"url":"https://x.com/user/status/123","note":"...","source_type":"x"}],"evidence_against":[]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.043","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":"$0.043/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.043","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.043","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_mhlwk22QPGkOPsAG4XcWe","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.043","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies a text claim by gathering evidence for and against it from recent sources, returning a verdict, confidence level, and cited evidence URLs.","exampleAgentPrompt":"Can you fact-check the claim 'Electric vehicles produce more lifetime emissions than gas cars' — look back over the last 14 days and pull up to 8 sources per side?","exampleUseCases":[{"title":"Verify viral social media claim","prompt":"I saw a tweet saying 'the US government spent $2 trillion on foreign aid last year' — can you fact-check that claim looking at sources from the past 7 days, and show me up to 6 pieces of evidence on each side?"},{"title":"Validate health or science statistic","prompt":"Can you check whether it's true that 'drinking coffee reduces the risk of Alzheimer's disease by 65%'? Look back 30 days and give me up to 10 sources for and against."},{"title":"Check accuracy of political statement","prompt":"Fact-check the claim 'Inflation in the US hit a 40-year high in 2022' — use the last 7 days of sources and return up to 5 evidence items per side with links."}],"resultDescription":"Returns a JSON object with the original claim, a plain-language summary, a verdict (e.g. 'confirmed', 'refuted', 'unverified'), a confidence level (e.g. 'high', 'medium', 'low'), and two arrays — evidence_for and evidence_against — each containing source URLs, notes, and source type (e.g. 'x', 'web').","failureModes":["Claim too vague or ambiguous for a clear verdict — returns low confidence or inconclusive","No evidence found within the specified days_back window — evidence arrays empty","days_back exceeds 30 or max_sources exceeds 10 — validation error","Payment failure via x402 — request rejected before processing","Claim text exceeds 1000 characters — rejected by schema validation"],"whenToPreferThis":"Choose this endpoint when you need a structured, sourced verdict on a specific factual claim — especially when you want both supporting and contradicting evidence with cited URLs. It is more useful than a generic chat model for fact-checking because it returns machine-readable verdicts and confidence scores with traceable sources, and more targeted than a web search API because it interprets and weighs evidence automatically.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T00:43:26.798Z","isFirstParty":false,"canonicalSlug":"mapleai-fact-check-5fedc52f"}