MailChimp Installation $ composer require mkucera/mailchimp Usage <?php $guzzle = new GuzzleHttp\Client(); $mailChimp = new Mkucera\MailChimp('https://us14.api.mailchimp.com/3.0/', 'my-api-key', $guzzle); $mailChimp->subscribe('john.doe@gmail.com', 'my-list-id');