You can access MatrixStore vaults through MatrixStore Linux hub and hub+ appliances.
They provide a SMB interface to read and write to a MatrixStore Cluster. It is primarily designed to move data to and from a MatrixStore cluster. It is not designed to support 'work in progress' workflows (editing of any document of any kind)."
It's currently based on SAMBA v4.3.11, with supports SMB v3.1.1 and older.