Maintained by Campaign Monitor, this package wraps the Campaign Monitor API so that PHP applications may interface with it, implementing the full functionality of the API. The Campaign Monitor API allows users to interact and "sync" with their Campaign Monitor account via simple web-based methods. Common uses of the API include: *Automatically sync subscribers between Campaign Monitor and a third party tool. *Create and send custom email campaigns to segments of subscribers built on the fly. *Develop useful plugins and integrations like these guys for other popular apps *Automatically create a client account, set billing and load it with ready-to-send templates.