This library is currently in BETA testing. In order to use this library you must have:
1. A valid Constant Contact account. You can register for a free trial with no credit card at http://www.constantcontact.com
2. A valid API Key for your Constant Contact account, obtained from http://developer.constantcontact.com


Technical Requirements:
1. PHP 5.1.3+
2. PHP cURL extension (http://php.net/manual/en/book.curl.php)


Notes:
This Constant Contact PHP Library supports both basic and OAuth authentication. For more information on authentication as well as usage of this library, please see the wiki.