APIs enabling IoT summarizes how APIs act as the backbone that connects wireless sensors, big data, and applications in the Internet of Things. It discusses how APIs allow devices and things to be connected and interact, giving examples like Nest using APIs for its smart home products. The document also categorizes different types of web service APIs commonly used for IoT, including SOAP, XML-RPC, JSON-RPC, and REST. Finally, it briefly mentions some popular IoT platform tools and standardization efforts in the IoT/M2M space.