Google released an API for programmers to use in order to import one’s Gmail contact list, synchronize contact lists, or export another contact list to Gmail. Using this API, it is possible to add, edit, and delete contacts with Google’s Data Protocol. Before the release of this API, users were required to enter their username and password to allow an application or service to access their contact list. Now, using this API, releasing one’s username and password is unnecessary.

The number of extensions for Thunderbird is most impressive, and I would like to create an extension to work with Google’s contact API and import, export, sync, add, remove, and edit contacts. This extension will help people maintain and synchronize contact lists on several computers through Google’s contacts.