Written by Google, this library is an easy-to-use and efficient Java client library for accessing Google APIs using JSON and OAuth 2.0. It also supports older Google Data APIs based on XML.

Works on these platforms that support the Java language:

Java 5 (or higher) standard (SE) and enterprise (EE)
Android
Google App Engine

To start, please read the Developer's Guide.

Next, download the Google API libraries and try the samples.

Read the Get Help page to ask questions, report a bug, or subscribe to announcements.

This library is built on top of two common libraries, also built by Google, but designed to work with any HTTP service on the web: the Google HTTP Client Library for Java and the Google OAuth Client Library for Java.

Status: This library is in beta and under active development.