If your platform isn't listed on X or API Integration isn't suitable, you can also use the GoSweetSpot Local Connector 

The Local Connector is a utility application that can be installed on a PC/Server, for sending orders data from a source system to the GoSweetSpot back-end.

This runs as a Windows Service on the machine, hence does not require any active users to be logged in for it to work.

See https://support.gosweetspot.com/hc/en-us/articles/115005563127-Local-Connector-Installation for more information