Send SMS to HTTP SMSC

Hello ,
I am trying to send and SMS using playSMS and Kannel as gateway to an HTTP API provider.
The provider API expects POST message in format https://providerip/?phone=’.....................’;message=’............’;key=
How should I configure SMSC in Kannel conf file to be able to call that API ?
I see there is only send-url parameter under SMSC=http should it work with POST requests ?

Regards,
Vasil