Skip to content
This repository has been archived by the owner on Dec 1, 2022. It is now read-only.


Google Cloud Messaging

Google Cloud Messaging (GCM) is a service that lets developers send data from servers to users' devices, and receive messages from devices on the same connection. The service provides a simple, lightweight mechanism that servers can use to tell mobile applications to contact the server directly to fetch updated application user data. The GCM service handles all aspects of queueing of messages and delivery to client applications running on target devices.

This project contains client libraries and samples to help developers interface with and explore the Google Cloud Messaging APIs.

For more information on GCM, including an overview and integration instructions, see Cloud Messaging.

For help getting started with GCM, see the GCM Quickstart for Android or the GCM Quickstart for iOS.


If you've found an error in this project's code, please file an issue:


Copyright 2015 Google, Inc.

Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.