 The Materials Provenance Store, MPS, is a database designed to store and manage the metadata and experimental provenance from materials science experiments. It provides a platform for users to search and retrieve data related to their specific needs. The MPS has been populated with over 30 million experiments run on over 12 million samples, making it a valuable resource for materials scientists. This article was authored by Michael J. Stat, Brian A. Raw, Dan Guevara, and others.