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zhuanqian research API – Web Page Metadata Extractor
x402
zhuanqian research API – Web Page Metadata Extractor is a paid API for AI agents from research-api-production-d642.up.railway.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).
Fetches a public URL and returns structured metadata (title, author, publication date, description, word count) about the page.
Price / call$0.002
Success—
StatusUnknown
How this service works
Research digest (HN/GitHub/arXiv) and web page → markdown extractor. Paid x402 (USDC on Base) routes under /paid/*; free rate-limited demo under /v1/*.
Output
A JSON object containing the page's canonical URL, title, author (or null if not found), published date (or null), word count as an integer, and a short description (or null if unavailable).
Example use cases
Article authorship and publication lookup
“Who wrote the article at https://www.wired.com/story/ai-agents-future-work/ and when was it published?”
Content length check before summarization
“Before I summarize it, can you check how many words are in the page at https://www.nature.com/articles/s41586-024-00001-x?”
Research citation metadata extraction
“I need the title, author, and publication date for the page at https://arxiv.org/abs/2405.12345 so I can fill out a citation.”
Technical details
Endpoint
GEThttps://research-api-production-d642.up.railway.app/paid/meta?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need lightweight structured metadata (title, author, date, word count, description) from a public web page without needing the full article body. It is ideal for citation building, content triage, or pre-summarization checks. Prefer it over full-text extractors when you only need header-level metadata and want a fast, low-cost ($0.002 USDC) call.
Side effects
- Non-public or paywalled URLs may return null for most fields
- URLs that require JavaScript rendering may yield incomplete or missing metadata
- Malformed or inaccessible URLs will return an error
- Rate limiting on free /v1/* tier; paid /paid/* tier requires valid x402 USDC payment on Base
- Private or localhost URLs will be rejected as they require a public HTTPS URL
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://example.com",
"title": "Example Domain",
"author": null,
"published": null,
"word_count": 20,
"description": null
}
}Tags
x402
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