It is possible to get virtual database (VDB) status from the CLI.
Log into the CLI as any user that has privileges on the VDB.
From source go to the VDB you want to get a status on.
delphix > source delphix source > ls delphix source > select <yourvdb>
Run the get runtime command to see all information or just get runtime.status for if the VDB is running.
delphix source 'vdb' > get runtime
delphix source 'vdb' > get runtime.status
If you would like to see more than one VDBs status you can also do the following:
delphix > source delphix source > list display=name,runtime.status