Reference Verifier – DOI & Citation Checker
Pricing
from $10.00 / 1,000 reference checkeds
Reference Verifier – DOI & Citation Checker
Check DOIs and full citations: does each reference exist, canonical metadata, match confidence, plus retraction, correction and expression-of-concern flags (Crossref + Retraction Watch). For grant proposals, manuscripts and AI-written text.
Pricing
from $10.00 / 1,000 reference checkeds
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Research Analyst
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Paste DOIs or full citations; get back whether each reference really exists, its canonical metadata, a match confidence for free-text citations, and flags for retractions, corrections and expressions of concern.
Why use it
- Check reference lists of grant proposals and manuscripts before submission
- Catch hallucinated references in AI-written text
- Screen bibliographies for retracted papers
No API keys, no scraping of HTML – the actor talks to the official public API, handles paging, rate limits and retries, and returns flat JSON you can export as CSV/Excel or call from code, Make, Zapier, n8n or AI agents (Apify MCP server).
Input
| Field | Title | Description |
|---|---|---|
references | References | One DOI or one full citation per line. |
checkRetractions | Check retractions & corrections | Look up update notices (Crossref, incl. Retraction Watch data). |
email | Contact e-mail | Optional; routes requests to Crossref's faster 'polite' pool. |
Example input:
Output (one dataset item per result)
Status values
verified (DOI resolves) · verified_arxiv (arXiv ID exists and matches the title) · partial_match (similar paper found, check details) · arxiv_id_not_found · arxiv_id_title_mismatch · doi_title_mismatch (DOI exists but belongs to a different paper than the cited title – typical for invented references) · doi_not_found · probable_match (citation matched with ≥85 % title coverage and consistent year) · no_reliable_match · error
Pricing
Pay per event: $0.01 per reference-checked (reference checked). You only pay for results you get;
set a max cost per run to cap spending.
Data source & terms
Crossref REST API (metadata CC0; Retraction Watch data via Crossref). Please respect the data provider's terms and cite the original resource in publications. This actor is an independent tool and is not affiliated with or endorsed by the data provider.
