Enter a URL in the app then CallPOST will send an http post any time a call is made or received. The post will contain details about the call and identifying details about your phone.
Upgrade to the paid version to enable the premium options including sending your device's unique ID and optionally disabling incoming or outgoing posts.
The variables sent in the post are:
type - Either 'incoming' or 'outgoing'.
number - The incoming or outgoing number.
device - The unique device ID of your phone ("0" on the free version)