The Chartbeat Ruby SDK by Al Shaw allows to communicate with the API to integrate charts analytics data into web services. Resources include installation and usage. Code shows real time calls, historical calls, and alternative options.
The semantic text mining Alchemy API is now a member of the API Billionaires Club. The service, which makes sense of raw unstructured data, averages 65-75 million requests per day, according to Alchemy's Elliot Turner. That brings the monthly count above 2 billion API requests.