This white paper discusses identifying potential API use cases in the telecommunications industry. It begins by outlining common business drivers for API initiatives such as speed, reach, internet of things, and domains. It then describes a methodology for identifying business APIs that focuses on understanding the audience, their needs, and terms of use. Examples of potential telecom APIs are provided for internal developers, partners, public access, and using mobile device features and location data. The paper argues that telecom companies can expand their business and acquire new customers by developing and exposing relevant APIs.