Firebase Cloud Messaging (FCM) is the new version of GCM. It inherits the reliable and scalable GCM infrastructure, plus new features! See the FAQ to learn more. If you are integrating messaging in a new app, start with FCM. GCM users are strongly recommended to upgrade to FCM, in order to benefit from new FCM features today and in the future. Before you go, please visit our GCM and FCM developer survey to give us feedback!

Community and Support

There are several options for getting help when you're stuck. Depending on the kind of information you are looking for, you may want to post a question on Stack Overflow, log a bug on the GCM samples, or contact Google directly about an issue with your GCM integration. Review the rest of this page to make sure you pick the right option to get the best and quickest response.

Ask the GCM development community on Stack Overflow

On Stack Overflow, Google engineers monitor and answer questions with the tag google-cloud-messaging. This is the right place to ask generally applicable questions about using GCM APIs. If your question relates specifically to a particular client platform, add the appropriate tag (ios, android, or chrome) to the google-cloud-messaging tag when you ask your question.

Get Google support for issues with your GCM integration

To report bugs or debug sensitive issues in your GCM integration effort, contact Google directly through this form. You’ll be able to provide your project credentials along with a detailed description of the issue. Note that, if you send general development questions through this channel, you’ll be directed to Stack Overflow.

Report bugs on GCM samples on github

If you have questions or issues regarding GCM samples on GitHub, submit them to the issue tracker. It's a good idea to search the existing issues before filing a new one.

Provide feedback

Using the Send Feedback link at the top right of all pages in this documentation, you can submit issues and suggestions on the documentation, or product feedback on GCM. The feedback form lets you highlight relevant areas of the page, black out personal information, and provide a text description of your feedback. In your description of the issue, you can provide a contact email address if you prefer.

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Cloud Messaging
Cloud Messaging