Google Blocking access to Autocomplete API in August 2015, it made manipulating automatic completions a little more tricky

Say goodbye to the Autocomplete API. The decease of Autocomplete API made it a little more difficult for Autocomplete Changers to change as you type suggestions, but by no means imposible.  Search Engine Reputation Management experts quickly came up with new solutions to get access to the long string of top phrases (100s of autocomplete suggestions instead of 5) Autocomplete API afforded.

Sourced through Scoop.it from: venturebeat.com