Trellian Keyword Discovery

Keyword Discovery collects keyword data from many different search engines world wide and compiles a range of search related statistics. KeywordDiscovery.com offers a searchable database of over 32 billion search queries, archived over a 12 month period. It enables advertisers and search engine marketers to effectively target keyword based advertising, provide advanced keyword research and analysis of search trends. The API allows developers to integrate the Keyword Discovery service into their own websites. It uses RESTful calls and responses are formatted in XML.