paper-lookup
K-Dense-AI/claude-scientific-skills
Search PubMed, PMC, bioRxiv, medRxiv, arXiv, OpenAlex, Crossref, Semantic Scholar, CORE, and Unpaywall via their APIs to find papers, metadata, citations, OA PDFs, or preprints by DOI, PMID, author, or keyword while guiding the best database choices.