Hi @lat9, thanks for your reply.

It seems ground saver cannot be found under ups website. Maybe it is still a pilot program now. Here are some developer information I found which are surepost related. I'm not sure if any difference between surepost and ground saver. Maybe UPS just rebranded surepost into ground saver.

https://www.ups.com/worldshiphelp/WS..._Shipments.htm
https://stackoverflow.com/questions/...s-surepost-api

Here is the service codes for surepost (posted back in 2017):

92: UPS SurePost Less than 1LB
93: UPS SurePost 1LB or greater
94: UPS SurePost BPM
95: UPS SurePost Media Mail

At least, the example shipping label pirateship uses for ground saver is surepost label.
https://support.pirateship.com/en/ar...u-need-to-know