Is it possible to register a car via API?
Unfortunately it’s not possible to directly register a car via API. However, ServiceNSW does offer two web services which may be of interest.
It’s possible to renew your vehicle registration online here: https://www.service.nsw.gov.au/transaction/renew-vehicle-registration
You can also check and retrieve vehicle registration information from here: https://www.service.nsw.gov.au/transaction/check-vehicle-registration
I hope this helps. Please get in contact if you have any further questions.