A subcategory of phosphohydrolases that are specific for MITOGEN-ACTIVATED PROTEIN KINASES. They play a role in the inactivation of the MAP KINASE SIGNALING SYSTEM.

Synonyms: Phosphatases, MAPK, EC 3.1.3.16, Mitogen-Activated Protein Kinase Phosphatases, MAPK Phosphatases, Mitogen Activated Protein Kinase Phosphatases, Mitogen-Activated Protein Kinase Phosphatase, Mitogen Activated Protein Kinase Phosphatase