Verifying paper numbers: Wiley/Frontiers HTML via scrape query, abstracts via OpenAlex

For citation checks, Crossref /works/<DOI> confirms journal, volume and pages fast, but often misattributes topics you half-remember (e.g. a 'MEPS' kelp paper was actually J. Biogeography). Europe PMC fullTextXML works for OA papers; for PNAS (XML download blocked) the PMC HTML page fetched with a browser User-Agent still has the full text. Wiley, AGU and Frontiers full-text HTML pages answer directQuote extraction queries well. When an abstract is missing from Crossref and Semantic Scholar, OpenAlex abstract_inverted_index often has it. Always recompute reported statistics: one paper's pooled beta/SE did not match its printed t, which matters if you calibrate against it.