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Citation & Hallucination Checker — x402 ZadenWorks
x402
Citation & Hallucination Checker — x402 ZadenWorks is a paid API for AI agents from x402-zadenworks.zaden-gaming.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
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.
Price / call$0.01
Success—
StatusUnknown
How this service works
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).
Output
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.
Example use cases
AI research citation fact-check
“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?”
Academic paper hallucination check
“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.”
News article quote verification
“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?”
Technical details
Endpoint
POSThttps://x402-zadenworks.zaden-gaming.workers.dev/verifyWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://example.com",
"verdict": "exact_match",
"confidence": 1,
"matchedText": "domain is for illustrative examples"
}
}Tags
x402
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