{"uid":"cap_7_mKPX9opq2i9ZxPukZHk","slug":"second-opinion-live-web-verification-48b2817e","name":"Second Opinion — Live Web Verification","description":"Second Opinion: an independent adversarial agent attempts to refute your claim (live web research) and returns a structured verdict with citations.","url":"https://secondopinionx402.com/v1/verify","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","bodyType","body","method"],"properties":{"body":{"properties":{}},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.2","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":"$0.2/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.2","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.2","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_5yP9F3ye-GhxzYDTviz0_","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.2","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Sends a claim to an independent adversarial agent that actively researches the web to attempt to refute it, then returns a structured verdict with citations.","exampleAgentPrompt":"Can you do a live web fact-check on the claim that 'the Eiffel Tower is the tallest structure in France' — run an adversarial check with real internet research and give me a structured verdict with citations?","exampleUseCases":[{"title":"Fact-checking a viral news claim","prompt":"I saw an article claiming that 'global EV sales surpassed 20 million units in 2023' — can you fact-check that with live web research and give me a verdict with sources?"},{"title":"Verifying a competitor's marketing assertion","prompt":"Our competitor's website says they have '99.99% uptime guaranteed for the past five years.' Can you run an adversarial web research check on that claim and return a structured verdict with citations?"},{"title":"Validating a scientific or medical claim","prompt":"Someone told me that 'vitamin D supplementation reduces COVID-19 mortality by 60%.' Can you have an independent adversarial agent research that claim on the web and tell me if it holds up, with sources?"}],"resultDescription":"A structured verdict object indicating whether the claim was refuted or supported, along with cited web sources used in the adversarial research, confidence signals, and reasoning from the independent skeptical agent.","failureModes":["Claim is too vague or ambiguous for the agent to research effectively","Live web research returns insufficient or conflicting sources, resulting in an inconclusive verdict","Payment of $0.20 USDC not settled via x402 protocol, causing authentication failure","Request body is malformed or missing the required claim input, returning a 400-level error","Web sources found are outdated or unreliable, reducing verdict quality","Rate limiting or timeout if the web research phase exceeds allowable duration"],"whenToPreferThis":"Choose this endpoint when you need an adversarial, citation-backed fact-check grounded in live web research — not just logical reasoning. It is superior to the 'quick' sibling endpoint when you need real-world evidence and citations rather than pure logical analysis. Prefer this over the 'panel' endpoint when you want a single, focused adversarial verdict rather than three distinct lens-based attacks. Ideal for journalism, due diligence, misinformation detection, or any scenario where current web evidence matters.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:36:53.585Z","isFirstParty":false}