The BigML iOS SDK by Felix Garcia Lainez allows interaction to the machine learning features of the API such as data sources, data sets, models, and predictions. References available include usage, testing, and support.
Although some developers may be unaware of the prevalence of real-time APIs, they are already used by some of the world’s most popular providers. This post by Phill Leggetter for the Pusher Blog discusses five reasons why API providers should embrace a real-time API to add more value to users.
With huge budgets spent on marketing, it's probably a good idea to keep track of which marketing avenues are working and which aren't. Call Tracking Metrics is a simple telephone call tracking service that aims at helping users link incoming calls to specific marketing campaigns and in so doing, easily track and analyze the amount of calls received due to that particular campaign. The Call Tracking Metrics API provides access to this functionality.