{"uid":"cap_K-kqlaLxapQRTZOXFhBWZ","slug":"asterpay-deep-fact-check-api-c36ffb29","name":"AsterPay Deep Fact-Check API","description":"Trust, discovery, and fiat settlement layer for AI agent commerce. Dual-protocol: accepts both x402 and MPP payments in USDC on Base. EUR/GBP/USD fiat settlement via SEPA Instant.","url":"https://x402.asterpay.io/v2/x402/ai/fact-check/deep","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"claim":{"type":"string"},"source":{"type":"string"}}},"responseSchema":{"type":"json","example":{"claims":[{"claim":"Tesla produced 1.8M vehicles in 2023","verdict":"supported","evidence":"Source confirms 1,845,985 vehicles.","confidence":0.95},{"claim":"Grew 35% YoY","verdict":"contradicted","evidence":"Source indicates 38% growth.","confidence":0.9}],"max_claims":5,"claims_checked":2,"overall_verdict":"partially_supported","overall_confidence":0.85}},"example":{"request":{"claim":"The Earth's average surface temperature has increased by approximately 1.1 degrees Celsius since pre-industrial times.","source":"According to multiple scientific organizations including NASA, NOAA, and the Intergovernmental Panel on Climate Change (IPCC), global temperature records from 1850 to present show a consistent warming trend. The IPCC's Sixth Assessment Report (2021) confirms that human activities have unequivocally warmed the climate system. Temperature measurements from weather stations, satellites, and ocean buoys provide comprehensive data supporting this observation. The warming has been accompanied by changes in precipitation patterns, sea level rise, and increased frequency of extreme weather events."},"response":{"data":{"model":"llama-3.3-70b-versatile","claims":[{"claim":"The Earth's average surface temperature can be measured.","verdict":"supported","evidence":"Temperature measurements from weather stations, satellites, and ocean buoys provide comprehensive data","confidence":1},{"claim":"There is a defined pre-industrial baseline for the Earth's average surface temperature.","verdict":"unverifiable","evidence":"The source text does not mention a defined pre-industrial baseline for the Earth's average surface temperature.","confidence":0.5},{"claim":"The Earth's average surface temperature has increased since pre-industrial times.","verdict":"supported","evidence":"global temperature records from 1850 to present show a consistent warming trend","confidence":1},{"claim":"The increase in the Earth's average surface temperature since pre-industrial times can be quantified.","verdict":"supported","evidence":"global temperature records from 1850 to present show a consistent warming trend","confidence":0.8},{"claim":"The quantified increase in the Earth's average surface temperature since pre-industrial times is approximately 1.1 degrees Celsius.","verdict":"unverifiable","evidence":"The source text does not provide a specific quantified increase in the Earth's average surface temperature since pre-industrial times.","confidence":0.5}],"passes":6,"summary":"3/5 supported, 2/5 unverifiable.","latency_ms":1417,"max_claims":5,"claims_checked":5,"overall_verdict":"partially_supported","overall_confidence":0.76},"meta":{"source_length":596,"source_bounded":true,"confidence_note":"Model-estimated heuristic, not a calibrated probability."},"success":true,"timestamp":"2026-06-17T21:38:29.375Z"}},"exampleRequest":{"claim":"The Earth's average surface temperature has increased by approximately 1.1 degrees Celsius since pre-industrial times.","source":"According to multiple scientific organizations including NASA, NOAA, and the Intergovernmental Panel on Climate Change (IPCC), global temperature records from 1850 to present show a consistent warming trend. The IPCC's Sixth Assessment Report (2021) confirms that human activities have unequivocally warmed the climate system. Temperature measurements from weather stations, satellites, and ocean buoys provide comprehensive data supporting this observation. The warming has been accompanied by changes in precipitation patterns, sea level rise, and increased frequency of extreme weather events."},"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_uDouwFBFOVTc3yq9u8s_K","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Performs deep AI-powered fact-checking of up to 5 claims, returning per-claim verdicts (supported/contradicted/unverified), evidence summaries, confidence scores, and an overall verdict.","exampleAgentPrompt":"Can you deep fact-check these two claims for me: 'Tesla produced 1.8 million vehicles in 2023' and 'that was a 35% year-over-year growth' — I need a verdict on each one with evidence and a confidence score, plus an overall verdict.","exampleUseCases":null,"resultDescription":"Returns a JSON object with a list of up to 5 checked claims, each containing the original claim text, a verdict (supported/contradicted/unverified), an evidence excerpt, and a confidence score (0–1). Also includes the total number of claims checked, the overall verdict (e.g. partially_supported), and an overall confidence score.","failureModes":["More than 5 claims submitted — API enforces a max_claims limit of 5","Payment not included or insufficient — 402 Payment Required response","Claim is ambiguous or unverifiable — verdict returned as 'unverified' with low confidence","Network timeout on deep analysis — may return partial results or error","Invalid JSON body — 400 Bad Request"],"whenToPreferThis":"Use this endpoint when you need deep, evidence-backed fact-checking with per-claim verdicts and confidence scores for up to 5 specific factual assertions. Prefer this over shallow or keyword-based checks when accuracy and evidence provenance matter. Ideal for verifying claims in financial reports, research documents, or news content before publishing or acting on them.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:33:18.400Z","isFirstParty":false}