Audit a paper from text you already have.

For paywalled venues with no preprint, no PMC deposit, and no self-archived PDF — the cases where the open-web fallback chain (OpenAlex, Unpaywall, EuropePMC, Semantic Scholar, arXiv) has nothing to retrieve. Paste the abstract, the full body, or upload a PDF; the same Claude Opus 4.7 extraction runs against what you provide, scored exactly the way the DOI flow scores an OA fetch. Have a DOI? Use the standard form →