Two-sample Mendelian randomization analysis tooling for curated GWAS summary datasets, provided through the TwoSampleMR R package and its documentation site (successor to the retired MR-Base Shiny web application)
⚠ The legacy MR-Base Shiny web application at app.mrbase.org was unreachable (no response) when checked on 2026-06-23 and has been retired; two-sample MR analysis is now performed via the TwoSampleMR R package against the OpenGWAS database.