{"uid":"cap_odFWVqjL0b8eBZglL04t6","slug":"citation-hallucination-checker-x402-zadenworks-2fe8e15e","name":"Citation & Hallucination Checker — x402 ZadenWorks","description":"Fourteen pay-per-call web tools for AI agents, billed in USDC on Base with no account or API key. START WITH /audit -- one call returns a complete page health check (SEO + structured data + accessibility, optionally plus links and sitemap) with a single score and one worst-first findings list. The parts are also sold individually. SITE AUDIT: /seo (on-page SEO and meta tags), /links (broken links), /sitemap (robots.txt and XML sitemap crawlability), /structured (JSON-LD and social preview tags), /a11y (WCAG accessibility) -- each scored 0-100 with a prioritised issue list. READING: /read (clean markdown), /snap (screenshot, PDF or rendered HTML), /tables (every HTML table as structured JSON), /verify (does a claim actually appear on this page). MONITORING: /watch (has this page changed), /compare (what differs between two pages). Plus /rank (best x402 service for a task) and /batch (several operations behind one payment).","url":"https://x402-zadenworks.zaden-gaming.workers.dev/verify","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","required":["url","claim"],"properties":{"url":{"type":"string","description":"Public http/https URL to check the claim against"},"claim":{"type":"string","description":"The quote or fact to verify appears on the page (max 2000 chars)"},"waitMs":{"type":"integer","maximum":5000,"minimum":0},"selector":{"type":"string"}}},"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","properties":{"verdict":{"enum":["exact_match","close_match","not_found"],"type":"string"},"confidence":{"type":"number"},"matchedText":{"type":["string","null"]},"closestParagraph":{"type":["string","null"]}}}}}}},"responseSchema":{"type":"json","example":{"url":"https://example.com","verdict":"exact_match","confidence":1,"matchedText":"domain is for illustrative examples"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_GXy3JjEWnEGlRoDjTwZLg","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies whether a claimed quote or fact actually appears at a given URL, returning exact_match, close_match with confidence score and closest passage, or not_found.","exampleAgentPrompt":"Can you check whether the quote 'AI systems will surpass human intelligence by 2030' actually appears on https://example.com/ai-report — tell me if it's an exact match, a close match, or not found at all?","exampleUseCases":[{"title":"AI research citation fact-check","prompt":"I got this quote from an AI summary: 'Global carbon emissions fell 7% in 2020 due to COVID lockdowns.' It claims the source is https://iea.org/reports/global-energy-review-2021 — can you verify if that quote actually appears on that page or if the AI made it up?"},{"title":"Academic paper hallucination check","prompt":"Before I submit this paper, can you check whether the claim 'Smith et al. found a 42% reduction in latency' actually appears anywhere on https://arxiv.org/abs/2301.00001? I need to know if it's an exact match, close match, or not found."},{"title":"News article quote verification","prompt":"A Twitter post is claiming that the CEO of OpenAI said 'We are not building AGI' and links to https://techcrunch.com/2024/01/15/openai-interview — can you verify whether that exact quote or something close to it is actually on that page?"}],"resultDescription":"Returns one of three match types: 'exact_match' if the claimed text is found verbatim; 'close_match' with a numeric confidence score (0–1) and the closest matching passage from the page; or 'not_found' if no semantically similar content exists. This allows the caller to assess whether a citation is valid, approximate, or fabricated.","failureModes":["URL is behind a paywall or login wall — page content inaccessible, returns not_found or error","URL is dynamically rendered and content not accessible to scraper — may miss content","Claimed quote is paraphrased so loosely that semantic matching fails to detect it","Network timeout or unreachable URL returns an error response","Very long pages may truncate, causing a legitimate passage to be missed","Payment failure via x402 protocol results in 402 response before any verification occurs"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, cheap ($0.01) programmatic check to verify whether AI-generated citations are real or hallucinated, or to confirm a specific quote or fact appears at a claimed URL. It is ideal for post-generation hallucination audits in RAG pipelines, research assistants, or content review workflows. Prefer it over full content extraction endpoints when the goal is specifically pass/fail citation verification rather than broad content analysis.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:32:36.159Z","isFirstParty":false}