gem install presbeus

you need to create ~/.config/presbeus.yml with:

password_command: /command_line/outputing/your/api/key

For example, if the api key is my-api-key it could be (though it is not secure):

password_command: echo my-api-key

You can configure a default device (see presbeus devices in using)

default_device: uYourDefaultDeviceID

list your devices:

$ presbeus devices
mydeviceid  MYDEVICE

list your SMS threads or a given device:

$ presbeus threads mydeviceid
1  Someone
2  Someone Else

list your SMS for a given device / thread:

$ presbeus thread mydeviceid 2

send an SMS:

presbeus sms mydeviceid phonenumber text for your SMS

show last active thread

$ presbeus last mydeviceid

To enable desktop notifications, you need to add to ~/.config/presbeus.yml:

notify_command: notify-send

And then you need to start presbeus in realtime mode:

$ presbeus realtime