This is a simple PHP library for interacting with the Bit.ly API from a PHP application. The library is based on Guzzle, allowing developers to easily add Guzzle plugins to their client. Also offered is integration with Symfony2. The client supports the new OAuth endpoints, as API key authentication has been deprecated. Though not directly supported by Bit.ly, the library is endorsed for use on the Bit.ly developer site. The Bit.ly API allows developers to implement programmatic shortening, sharing, and tracking of links (URLs). Unique user-level and aggregate links can also be created to let users view complete, real-time traffic and referrer data, as well as location and metadata.