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SiteCheck DOI Lookup
x402
SiteCheck DOI Lookup is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-15).
Looks up academic paper metadata by DOI or keyword search, returning title, authors, journal, citation count, and publication details via Crossref.
Price / call$0.001
Success—
StatusUnknown
How this service works
A DOI's bibliographic record from Crossref (title, authors, journal, publisher, date, type, citation count, license), or the best matches for a citation-style search (max 10). An unknown DOI answers 404, not charged.
Output
A JSON object with a list of matched works, each containing the DOI, canonical URL, article type, title, author names, journal, license URL, citation count, publication date, and publisher. Also includes the data source (Crossref) and a timestamp of when the data was fetched.
Example use cases
Citation count for a specific paper
“What's the citation count and full citation info for the paper with DOI 10.1016/j.cell.2017.05.038?”
Keyword search for recent papers
“Search for academic papers about CRISPR gene editing and give me the top 5 results with their DOIs, journals, and citation counts.”
Verify authorship of a research article
“I need to confirm the authors and publisher of the paper DOI 10.1126/science.aaa9273 — can you pull that up?”
Technical details
Endpoint
GEThttps://api.sitecheck-api.workers.dev/api/doi?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to resolve a specific DOI to its full bibliographic metadata, check citation counts, or search for academic papers by keyword via Crossref. Prefer this over general web search when you need structured, reliable scholarly metadata including authors, journal, publisher, and citation count in a single call.
Side effects
- DOI not found in Crossref — returns empty works array
- Invalid DOI format — may return no matches or unexpected results
- Search query too broad — returns up to 10 results but may miss the target paper
- Rate limiting or upstream Crossref API unavailability — request may fail or return stale data
- limit parameter out of range (must be 1–10) — may cause validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"count": 1,
"works": [
{
"doi": "10.1038/nature14539",
"url": "https://doi.org/10.1038/nature14539",
"type": "journal-article",
"title": "Deep learning",
"authors": [
"Yann LeCun",
"Yoshua Bengio"
],
"journal": "Nature",
"license": "https://www.springer.com/tdm",
"citations": 78302,
"published": "2015-05-27",
"publisher": "Springer Science and Business Media LLC"
}
],
"source": "Crossref REST API (https://api.crossref.org)",
"checkedAt": "2026-10-14T04:49:24.968Z"
}
}Tags
x402
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