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AgentFeed Paper Lookup by DOI
x402
AgentFeed Paper Lookup by DOI is a paid API for AI agents from x402.ochinimus.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-15).
Retrieves bibliographic metadata for an academic paper by DOI, including title, year, authors, venue, citation count, open-access URL, and abstract from OpenAlex.
Price / call$0.005
Success—
StatusUnknown
How this service works
Paper by DOI: title, year, authors, venue, citation count, open-access URL and the abstract where OpenAlex holds it (CC0 data). Use when you need to answer: What is the paper behind this DOI? Send the slash of the DOI as %2F in the path.
Output
A JSON object containing the DOI, title, publication year, authors list (with total author count), venue name, citation count, language, OpenAlex ID, open-access details (including URL if available), abstract text (when held by OpenAlex under CC0), data source, license, and a cache indicator.
Example use cases
Identify a paper from a DOI
“I found the DOI 10.1145/3292500.3330701 in a footnote — can you tell me the full title, authors, and publication year of that paper?”
Check if a paper is open access
“Is the paper with DOI 10.1126/science.1260419 available as open access? If so, where can I read it for free?”
Get citation count for a paper
“How many times has the paper 10.1016/j.cell.2018.05.010 been cited, and what venue was it published in?”
Technical details
Endpoint
GEThttps://x402.ochinimus.app/api/paper/10.1038%2Fnature14539?utm_source=zero.xyzWhen to prefer
Use this endpoint when you have a specific DOI and need structured bibliographic metadata including abstract and open-access URL without scraping publisher sites. Prefer this over general web search when you need machine-readable citation data, open-access status, or author lists directly tied to a DOI. It is especially useful when building citation graphs, verifying paper existence, or enriching references in a document.
Side effects
- DOI not found in OpenAlex — returns empty or error response
- Malformed DOI in path causes 400 or routing error
- Abstract not available — returned as null for papers where OpenAlex does not hold it
- Open-access URL missing if paper is paywalled or not indexed
- Rate limiting or payment failure causes 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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