The term "connected device” is typically used to mean a device or machine that is capable of connecting to a network - i.e. it can send and receive data via cellular, WiFi, or bluetooth connections. But is this really a connected device? Integration and interoperability are required for a device to be relevant in the Internet of Things, and Web APIs are the de facto standard enabling true connectivity. By looking at some successful implementations around connected “things”, we’ll understand the key requirements for an API First approach to IoT - including backend integration, mediation and security.