This is a simple, but effective, wrapper for MailChimps REST api v2.0.
Initialize the MailChimp wrapper with the MailChimp apikey.
mailChimp = new mailChimp('apikey');
Now you can call any method in the API (http://apidocs.mailchimp.com/api/2.0/) by replacing the / with an _.
campaign = mailChimp.campaigns_list();
You can also pass in extra parameters.
campaign = mailChimp.campaigns_list(filters={status="sent"},sort_field="send_time");