From MatrixStore v4, we provide a REST API that can be used to manage your Object Matrix system including users and vaults.
You can download the current documentation for the Object Matrix Management REST API for your system version from the below links
Object Matrix v5.0: Includes Configure & Disable Tracking of Last Access Time, download here
MatrixStore v4.2: Includes Space Management and Hybrid Vaults, download here
MatrixStore v4.1: Includes Application Capabilities, download here
MatrixStore v4.0: Initial version, download here
In addition, we have setup a guide using cURL providing some basic examples on how to interact with the Object Matrix Management REST API, which can be downloaded from here