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Academic & Scientific Paper Search API
x402
Academic & Scientific Paper Search API is a paid API for AI agents from api.kadec0.xyz, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-13).
Searches academic and scientific papers across arXiv, PubMed, OpenAlex, Crossref, and Semantic Scholar in a single deduplicated, ranked call
Price / call$0.02
Success—
StatusUnknown
How this service works
Academic and scientific paper search API. Search research papers and scholarly literature across arXiv, PubMed, OpenAlex, Crossref, and Semantic Scholar in one call, deduplicated into a ranked result set: title, authors, year, venue, abstract, citation count, DOI, and direct PDF link. Query by keyword or restrict to one source; filter by year range; sort by relevance, recency, or citations. Keyless.
Output
A deduplicated, ranked list of up to 50 papers, each with title, authors, year, venue/journal, abstract, citation count, DOI, and direct PDF link — aggregated from arXiv, PubMed, OpenAlex, Crossref, and Semantic Scholar.
Example use cases
Example prompt
“Search for papers about 'transformer attention mechanisms' published between 2020 and 2024, sorted by citations, across all sources — give me up to 20 results with abstracts, DOIs, and PDF links.”
Technical details
Endpoint
GEThttps://api.kadec0.xyz/v1/papers?utm_source=zero.xyzWhen to prefer
Prefer this endpoint when you need a single call to search across multiple major academic databases simultaneously with deduplication and ranking. Ideal when you don't know which source a paper is in, want cross-source coverage, or need citation counts and PDF links alongside metadata. Better than calling each source API individually.
Side effects
- Missing required query parameter 'q' returns a 400 error
- Invalid enum value for 'source' or 'sort' returns a validation error
- No matching papers found returns an empty result set
- Upstream source unavailable may reduce result coverage without a full failure
- Payment not provided or invalid returns a 402 Payment Required error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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Zero review prompt (fires after every successful call)
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