If you’d like to test your Firebase push notifications service or you’re considering to use another push notifications service provider you should take a look at Amazon Simple Notification Service. You can use Amazon SNS for sending example push notifications via Firebase Cloud Messaging to your mobile application.
In this short example I’ll show you how you can send a message to a specific user of your Android application. So far I couldn’t find a solution to send messages to Firebase topics subscribers but at least you don’t have to deal with OAuth tokens.
Continue reading Send test FCM push notification with Amazon SNS