The Message Faces provides users the ability to integrate the service into their applications. Message Faces is a service that provides users with images of the people who send email in order to enrich email inboxes or address books. With Message Faces users can recognize who is sending email immediately from their personalized photo icon, and distinguish which emails are important. Currently Message Faces supports Yahoo!, GMail, Apple Mail, AOL, GMX, web.de, Mozilla Thunderbird and Roundcube. The API is currently in Beta. The API uses RESTful protocol and responses are formatted as PNG files.