Abstract: An Application Program Interface (API) is defined at a requesting terminal. The API provides a common interface between an application program requesting a location for a target mobile terminal and a location server at the requesting terminal. The location server may be integrated into the API or may be a separate entity. The application program executing on the requesting terminal sends a request through the API for the location of the target mobile terminal. Thus, the API hides the positioning technology details and complexities from the requesting application program. The API communicates with a location determining source that determines the location of the target mobile terminal. The location determining source may be the target mobile terminal. Alternatively, the location determining source may be a network location server such as a Gateway Mobile Location Center or Mobile Positioning Center.