18 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
Resolve one research paper and fuse its metadata across OpenAlex, Crossref, Unpaywall and Semantic Scholar into a single cited JSON. Give a doi, arxiv, pmid, pmcid, openalex_id or title and get canonical metadata, author...
Scholarly search API - academic papers and research articles for a query, powered by OpenAlex. Returns ranked works with title, authors, year, venue, DOI, citation count and open-access status. A google-scholar-style res...
Academic paper search across Google Scholar, arXiv, Crossref, OpenAlex and Semantic Scholar in one call, merged by DOI / arXiv id / title: title, authors, year, venue, citation count, DOI, abstract, landing page and open...
Search the scholarly literature by keyword or topic and get a ranked list of works with core metadata. Optional filters for year range, open-access only, concept and institution. Powered by OpenAlex. A cheap first step b...
Disambiguate a researcher and return their profile: works count, citation count, h-index, institutions with ROR, top concepts and top works. Give an orcid for a resolved profile, or a name for ranked candidates. Distinct...
Locate a free open-access PDF for a DOI. Returns whether an open-access copy exists and the best PDF link with its license, version and host type, from Unpaywall and OpenAlex. A cheap, focused open-access locator.
Patent search - search patents by keyword, technology or assignee; returns publication number, title, dates, inventors, assignee and snippet. KEYLESS Google Patents. via x402, $0.01. ALIAS PATH of /api/patent-search.
Patent search - search patents by keyword, technology or assignee; returns publication number, title, dates, inventors, assignee and snippet. KEYLESS Google Patents. via x402, $0.01. ALIAS PATH of /api/patent-search.
Open Library book search - openlibrary book search, public domain book search by title or author, book metadata, first published year, edition count and downloadable archive.org identifiers. ALIAS PATH of /api/openlibrar...
Search the scholarly literature by keyword or topic and get a ranked list of works with core metadata. Optional filters for year range, open-access only, concept and institution. Powered by OpenAlex. A cheap first step b...
Resolve one research paper and fuse its metadata across OpenAlex, Crossref, Unpaywall and Semantic Scholar into a single cited JSON. Give a doi, arxiv, pmid, pmcid, openalex_id or title and get canonical metadata, author...
Citation graph of a paper: the works it references (outgoing) and the works that cite it (incoming), each as normalized records, plus the Semantic Scholar influential-citation count. Give a doi, arxiv, pmid, openalex_id...
Disambiguate a researcher and return their profile: works count, citation count, h-index, institutions with ROR, top concepts and top works. Give an orcid for a resolved profile, or a name for ranked candidates. Distinct...
Locate a free open-access PDF for a DOI. Returns whether an open-access copy exists and the best PDF link with its license, version and host type, from Unpaywall and OpenAlex. A cheap, focused open-access locator.
Paid scholar evidence card for a research claim (cycle 217, x402 $0.01) - GET ?query=<CLAIM_OR_TOPIC> OR ?sample=1|2|3 OR POST application/json {query}. KEYLESS arXiv (export.arxiv.org Atom), Crossref (api.crossref.org)...
Paid AI-citable source credibility scorer (cycle 109) — fetches URL, extracts article text + meta description + article:published_time, then computes 6 sub-scores: hedging language density (30 terms tracked), sourcing (c...
Paid citation-density + source-quality audit — counts anchor + JSON-LD + cite + blockquote + soft-text outbound references, classifies by tier (primary .gov/.edu/standards / secondary news+publishers / tertiary blogs / s...
Paid E-E-A-T signal audit (Experience/Expertise/Authoritativeness/Trust) — JSON-LD Organization/Person/author markup + byline + author bio links + about/contact/team/editorial/corrections/funding pages + social profile v...