get status phone in command line

[Fixit]

Hello,
I am surprised not to find a possibility to easily recover the Phone status with command line.
I used until recently SNMP but on new phones there is no longer service.

I have need it for a script: I will check if account is registered and I'm trying to find out if the account is "Registred" and if not send a alert.

The restfull interface is a good start but there ars not keyword "status".

Regards,
Ben