Are you a developer who uses Google’s unofficial Autocomplete API? Be warned, you won’t be able to do so anymore after August 10, 2015.
Google currently supports more than 80 APIs that developers can use to integrate Google services and data into their applications. The company also has unsupported and unpublished APIs which people outside the company have discovered and leveraged. One of those is the Autocomplete API.
Google Search’s autocomplete service attempts to predict a query before a user finishes typing. For quite some time now, this functionality has been available for incorporating into apps without any restrictions and completely independent of Google Search.