{"uid":"cap_NA9WBQ0vbHufwDp2qa_i3","slug":"zhuanqian-research-api-web-page-metadata-extractor-8b7b3778","name":"zhuanqian research API – Web Page Metadata Extractor","description":"Research digest (HN/GitHub/arXiv) and web page → markdown extractor. Paid x402 (USDC on Base) routes under /paid/*; free rate-limited demo under /v1/*.","url":"https://research-api-production-d642.up.railway.app/paid/meta?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["url"],"properties":{"url":{"type":"string","description":"public https URL"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"url":"https://example.com","title":"Example Domain","author":null,"published":null,"word_count":20,"description":null}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_og5bn1ec2l-KVUReymjNB","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches a public URL and returns structured metadata (title, author, publication date, description, word count) about the page.","exampleAgentPrompt":"Can you pull the metadata for this article — title, author, publish date, and word count — from https://techcrunch.com/2024/05/01/openai-new-model/?","exampleUseCases":[{"title":"Article authorship and publication lookup","prompt":"Who wrote the article at https://www.wired.com/story/ai-agents-future-work/ and when was it published?"},{"title":"Content length check before summarization","prompt":"Before I summarize it, can you check how many words are in the page at https://www.nature.com/articles/s41586-024-00001-x?"},{"title":"Research citation metadata extraction","prompt":"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."}],"resultDescription":"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).","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T12:34:38.454Z","isFirstParty":false,"canonicalSlug":"zhuanqian-research-api-web-page-metadata-extractor-8b7b3778"}