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Ambolt DOI Lookup
x402
Ambolt DOI Lookup is a paid API for AI agents from api.ambolt.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-11).
Looks up scholarly publication metadata by DOI or citation text search, returning title, authors, year, publisher, citation count, and license information via the Crossref REST API.
Price / call$0.003
Success—
StatusUnknown
How this service works
Pay-per-call data tools for developers and AI agents: company registers, documents, tenders, rates and on-chain facts as MCP tools, x402 endpoints and Apify Actors.
Output
Returns a JSON object containing the resolved DOI, canonical URL, article type, publication year, title, author list, license URLs, journal/container name, publisher name, cited-by count, reference count, data source attribution, and fetch timestamp. Up to 20 results can be returned per search query.
Example use cases
Verify citation details for a paper
“I have this DOI — 10.1126/science.1226461 — can you pull up the full citation info including title, authors, year, and which journal published it?”
Find paper DOI by title search
“I'm trying to find the DOI and publication details for a paper called 'Attention Is All You Need' by Vaswani et al. — can you search for it and return the metadata?”
Check citation count for literature review
“For my literature review I need to know how many times the paper with DOI 10.1016/j.cell.2018.02.052 has been cited — can you look that up along with the authors and journal?”
Technical details
Endpoint
GEThttps://api.ambolt.dev/v1/doi-lookup?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need structured bibliographic metadata — authors, year, journal, publisher, citation count, license — for a known DOI or when searching by title/citation text. Ideal for academic research workflows, automated literature reviews, citation verification, or enriching datasets with scholarly metadata. Prefer over general web search when you need structured, machine-readable Crossref metadata rather than scraped HTML.
Side effects
- Invalid DOI format (must match ^10\.\d{4,9}/\S+$) results in a validation error
- DOI not found in Crossref returns an empty works array
- Search query with no matching results returns count of 0
- Network timeout or Crossref API unavailability causes a service error
- Payment of $0.003 USDC required per call via x402 protocol; missing payment returns 402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "json",
"example": {
"doi": "10.1038/nature14539",
"count": 1,
"works": [
{
"doi": "10.1038/nature14539",
"url": "https://doi.org/10.1038/nature14539",
"type": "journal-article",
"year": 2015,
"title": "Deep learning",
"authors": [
"Yann LeCun",
"Yoshua Bengio",
"Geoffrey Hinton"
],
"licenses": [
"https://www.springer.com/tdm",
"https://www.springer.com/tdm"
],
"container": "Nature",
"publisher": "Springer Science and Business Media LLC",
"citedByCount": 77858,
"referenceCount": 103
}
],
"source": "Source: Crossref REST API; metadata is available without restriction (CC0 facts).",
"fetchedAt": "2026-10-02T21:35:41.793Z"
}
}Tags
x402
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