Academic Paper Search: Crossref & PubMed Metadata
Pricing
$0.10 / 1,000 paper results
Academic Paper Search: Crossref & PubMed Metadata
Search Crossref and PubMed in one run and get clean paper metadata and links: title, authors, DOI, PMID, venue, date. No full text and no API key.
Pricing
$0.10 / 1,000 paper results
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Lepi Data
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2 days ago
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What it does. Runs one keyword search across free official scholarly databases and returns one row per paper per source, with metadata and links only. Crossref and PubMed are live. arXiv support is coming soon and will turn on when enabled. Until then, selecting arXiv returns one free service-busy row, and the other sources still run normally.
Input (from .actor/input_schema.json)
query(required): keywords to search in paper metadatasources: any ofcrossref,pubmed,arxiv. Default["crossref","pubmed"].maxResultsPerSource: 1–1000, default 20. Maximum papers returned and charged from each source.
Output fields
type, source, title, authors (as published), published, venue, publisher (Crossref), doi, pmid, pmcid, arxivId, categories (arXiv), citedByCount (Crossref), url (landing page), pdfUrl (link only, where the source lists one)
Free status rows (not charged): no-results, service-busy, source-error, invalid-input, free-plan-limit, charge-limit-reached, each with errorCode/message.
Example
Input: {"query":"large language models","sources":["crossref","pubmed"],"maxResultsPerSource":10}
Output row (illustrative shape): {"type":"paper","source":"crossref","title":"…","authors":["A. Author","B. Author"],"published":"2026-…","venue":"…","publisher":"…","doi":"10.…","citedByCount":…,"url":"https://doi.org/10.…"}
Data source and compliance
- Data comes only from the Crossref REST API and NCBI E-utilities (PubMed), plus the arXiv API when it's enabled. No keys, and requests can only go to those hosts.
- Metadata and links only. No abstracts, full text or PDFs are downloaded or returned. Copyright stays with publishers and authors.
- When arXiv is enabled, it will be limited to one shared request every 3 seconds across all users, per arXiv's API terms, so arXiv results will be slower. PubMed stays at or under 3 requests per second.
- If a source is busy or unavailable, you get a free
service-busyorsource-errorrow and are not charged for that source. - Free-plan accounts get up to 100 results per run.
Pricing. Pay per result: $0.10 per 1,000 papers, flat on every plan, no start fee. Free status rows are never charged.
