https://thenextweb.com/twitter/2018/07/24/twitter-to-place-new-restrictions-on-its-api-to-stop-abuse/

Twitter has announced it’s tightening control over its API in order to protect the platform from spam and abuse.

The Twitter API allows third-party developers to build software that interacts with the service. Starting from today, anyone who wishes to access it will face a stricter and more thorough vetting process, in order to weed out bad actors.