To use the Australia Post OnDemand services, you need to get an API key.
(You do not need an eParcel or Startrack account to use this service, although it might help expedite setup. For more information, talk to your Auspost Account Manager)
The OnDemand services are:
Evening Delivery (Same day local metro evening delivery)
Saturday Delivery (Same metro area, 1-6pm Sat delivery)
Now 3Hr Delivery (Same day 3-4hr local metro delivery)
For current zone information on availability, click here.
The steps to create an API key for Auspost OnDemand are the same as eParcel, so please follow the instructions in the link below, entering your OnDemand account number where applicable in the registration process: