The new API offers fine-grained access to a Gmail user's account, allowing an app developer to make simple HTTPS calls and get responses in a variety of formats, with OAuth 2.0 authorizing access ...

Designed to let you easily deliver Gmail-enabled features, this new API is a standard Google API, which gives RESTful access to a user’s mailbox under OAuth 2.0 authorization.

The new version of Gmail -- which was more of a back-end update -- has given developers access to an easy Greasemonkey API that makes developing plugins or changing the appearance of Gmail a breeze.

Google provides client libraries for Gmail API for several languages, such as Java, JavaScript, .NET, Python, Objective-C, and PHP.