Amazon has announced a Preview version of ACS for Devices. ACS for Devices is a streamlined method to deploy Amazon Device SDKs on devices. Amazon already uses ACS internally for devices such as the Echo Dot and Amazon Smart Oven.
The Sensetonic WoTkit (Web of Things kit) API enables developers to integrate its "WoTkit" sensing platform used to connect objects to the Internet. The idea extends to engaging "end users as ‘participatory sensors’, allowing our customers to offer new and revolutionary services." Sensetecnic's API joins a handful of at least 6 APIs related to the internet of things in our API directory.