The SEMRush PHP SDK by Andrew Waite interacts with the API to access search marketing features. It is possible to interact with organic search, adwords, and rank history methods. Resources include installation, setup, and caching.
Organizations of all sizes are starting to appreciate that there is a wealth of information starting to flow in and out of their companies via the APIs they decided to expose to third-parties. Now those organizations can start figuring out how to derive some value out of all that data.