MAPVar (MEN-Associated Pathogenic Variants) is a database of genetic variants linked with Multiple Endocrine Neoplasia, encompassing three genes: RET, MEN1 and CDKN1B. It encompasses 1286 pathogenic variants as well as variants of unknown or uncertain significance (VUS) curated from several sources, and reclassified according to ACMG & AMP (American College of Medical Genetics and the Association of Molecular Pathologists) guidelines. The resource aims to enable precision oncology through standardised interpretation of pathogenicity of genomic variants associated with the disorder. All variants were reclassified as part of the GVACI program, and independently validated by VS, SSB and BK labs at CSIR-IGIB.