Search PubMed, Europe PMC, OpenAlex, Crossref and ClinicalTrials.gov at once. We never host papers; every result links to where it lives.
Sources: PubMed/NCBI content is U.S. government public-domain metadata. Europe PMC and OpenAlex metadata is available under CC0/CC-BY as applicable to each record. Crossref metadata is used per Crossref's terms of use. We do not scrape publisher pages and do not store any full text -- every "Read" link opens the source's own page or an open-access copy the source itself reports.