Keyword API
The Keyword Service Platform has defined a set of APIs for each class of keyword services. These interfaces for Web services include keyword extraction (ITermExtraction), keyword categorization (ITermCategorization), keyword suggestion (ITermSuggestion), keyword forecast (ITermForecast), keyword monetization (ITermMonetization), and several others. The APIs define the signatures of each Web service.
Read more about this topic: Keyword Services Platform