The Sklik PHP SDK by Michal Kuchta allows API interaction to access search advertising features. Library and examples available, in addition to a tutorial at https://github.com/niximor/php-sklik/blob/master/sklik_tutorial.php
The Tapir API is really 3: Search, Ping and Post to give you the power to make your blog searchable, get your articles indexed immediately, and push content manually. Indexing of the Rss feed is done at 15 minute intervals. According to the API documentation, the results are returned in JSON or JSONP.
Nineteen APIs have been added to the ProgrammableWeb directory in categories including Cryptocurrency, Search, and Screenshots. Featured today is an API for adding personal safety features to applications and an API that provides data from the Mars Curiosity rover. Here's a look at what is new.