Verify citations, catch retracted papers, and profile papers, authors, journals and institutions from Crossref and OpenAlex.
payments ON MAINNET (real money) · 8 live endpoints
| Endpoint | Price | What it answers |
|---|---|---|
GET /author-profile | $0.02 | Researcher profile by name: works, citations, h-index and institution of the best match, with an ambiguity warning. |
GET /citation-verify | $0.02 | Verify a citation: does the DOI exist, does its real title match the claimed title, and has it been retracted? |
GET /doi-metadata | $0.02 | Clean bibliographic metadata for a DOI from Crossref: authors, journal, pages, publisher, license, plus a ready citation string. |
GET /institution-profile | $0.02 | Research institution profile by name: type, country, works, citations, h-index and top research topics. |
GET /journal-profile | $0.02 | Journal profile by name: output, citations, h-index, open-access status, DOAJ listing, article fee and quality flags. |
GET /paper-lookup | $0.03 | Paper profile by DOI: title, journal, year, citations, field-weighted impact, open-access link and retraction state. |
GET /paper-retraction-check | $0.02 | Has this paper been retracted, corrected or flagged? Notices from Crossref and Retraction Watch for a DOI. |
GET /topic-papers | $0.02 | Recent research papers on a topic from OpenAlex: title, year, citations, DOI and open-access link, most relevant first. |
GET /catalog returns this list as JSON. Activity hub · uptime.
Scholarly metadata computed from Crossref (including Retraction Watch data) and OpenAlex (CC0), provided as is, with no warranty of completeness. Retraction and correction notices lag; a paper can be unreliable without any notice. Author and institution matching by name is approximate. Not affiliated with Crossref or OpenAlex. Every paid response carries a disclaimer field.