The canonical, machine-citable reference library of research methods behind ScholarGate (https://scholargate.app). This version contains **6,620 research methods** (4,243 with a DOI-bearing citation) across the natural, health, social, and humanities domains, each with: name and aliases, a three-level taxonomy (domain → family → subfamily), a plain-language definition and intuition, when-to-use guidance, strengths and limitations, key citations, related methods, and — where available — Wikidata `sameAs` entity links.