{"uid":"cap_2G02atxcOnSbO6fHg6iCc","slug":"claim-grounding-deep-research-1b779a07","name":"Claim Grounding Deep Research","description":"Pay-per-call claim checks for AI agents. Sources: Wikipedia, Wikidata, Google News, Europe PMC (PubMed), FRED and SEC EDGAR. USDC on Base via x402 (Coinbase CDP facilitator). No API key. Every checked claim returns verdict: supported | contradicted | outdated | mixed | insufficient_evidence, plus status_detail and legacy_verdict (pre-1.2.0 value: supported | contradicted | not_found | conflict).","url":"https://claim-grounding.prospectintel.workers.dev/v1/deep_research?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"text":{"type":"string"},"claim":{"type":"object","properties":{"text":{"type":"string"}}},"answer":{"type":"string","description":"Text whose claims should be researched."},"claim_ids":{"type":"array","items":{"type":"string"}},"confirmed":{"const":true,"description":"Required. Without confirmed: true the call returns 400 and nothing is charged."}}},"responseSchema":{"type":"json","example":{"mode":"fast","poll":"GET /v1/jobs/job_8c1d2e3f4a5b6c7d (free)","claims":[],"job_id":"job_8c1d2e3f4a5b6c7d","status":"queued","receipt":{"claims":[{"text":"Paris is the capital of France","claim_id":"clm_3f9a1c2b4d5e6f70","grounding_required":true}],"job_id":"job_8c1d2e3f4a5b6c7d","created_at":"2026-10-10T12:00:00.000Z","priced_usd":8},"next_actions":[]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"8","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":"$8/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"8","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"8","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_HyeWvKwqWbwbntJXIyvGR","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"8","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks factual claims in text against Wikipedia, Wikidata, Google News, Europe PMC, FRED, and SEC EDGAR and returns a verdict on each claim's accuracy","exampleAgentPrompt":"Can you fact-check this paragraph from my report — 'The Federal Reserve raised interest rates seven times in 2022, and mRNA vaccines have been shown to reduce severe COVID-19 outcomes by over 90%' — and tell me whether each claim is supported, contradicted, or something else?","exampleUseCases":[{"title":"AI hallucination audit before publishing","prompt":"I just got a response from my AI assistant summarizing our competitor's recent SEC filings. Can you run a deep fact-check on it and flag any claims that are contradicted or not backed by evidence before I send it to my team?"},{"title":"Medical research claim verification","prompt":"My draft blog post says 'ivermectin has been shown in clinical trials to significantly reduce COVID-19 mortality.' Can you check that claim against PubMed and tell me if it's supported, contradicted, or if the evidence is mixed?"},{"title":"Financial data claim grounding","prompt":"Our analyst wrote that 'US inflation peaked at 9.1% in June 2022 and has been declining steadily since.' Can you verify that against FRED data and let me know if it checks out or if there's anything outdated or incorrect?"}],"resultDescription":"Returns a job receipt with a job_id and poll URL for async retrieval. Each claim in the input gets a claim_id, a verdict from the set (supported, contradicted, outdated, mixed, insufficient_evidence), a status_detail explanation, and a legacy_verdict for backward compatibility. The receipt also includes creation timestamp and the price charged in USD.","failureModes":["400 error if confirmed:true is not included in the request body — nothing is charged","Insufficient evidence verdict when sources don't cover the claim's subject","Outdated verdict for time-sensitive claims where sources have newer information","Mixed verdict when sources disagree on the claim","Long polling delay if the job queue is busy — client must poll the job URL returned in response","Claims about very niche topics may return insufficient_evidence due to limited source coverage"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to verify factual accuracy of specific claims against authoritative sources including Wikipedia, academic literature (PubMed), financial data (FRED), and SEC filings — especially when fine-grained verdicts (supported/contradicted/outdated/mixed/insufficient_evidence) are needed. Prefer this over generic web search when you need a structured, per-claim verdict rather than raw search results. Ideal for auditing LLM outputs, validating research summaries, or grounding agent-generated answers before they are shown to end users. The $8/call pricing makes it best suited for high-stakes fact checks rather than high-volume trivial lookups.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-17T06:31:11.662Z","isFirstParty":false,"canonicalSlug":"claim-grounding-deep-research-1b779a07"}