Set up push notifications for FCM | Chat Android SDK | Sendbird Docs
Where can I find my Google/Firebase Cloud Messaging API key?
Alex Xu on Twitter: "Steps 1 - 2: When the client app starts for the first time, the client app sends credentials to FCM, including Sender ID, API Key, and App ID.
Generating Firebase Cloud Messaging (FCM) Server Key and Sender ID for Web Devices
Show current android FCM server key in push notifications admin page | IdeaExchange
How to Migrate Your GCM Key to FCM? - PushEngage
Where can I find my Google/Firebase Cloud Messaging API key?
FCM Configuration - Support | Tapjoy
android - Firebase Cloud Messaging replaced the server keys with Tokens for sending notifications/messages - Stack Overflow
MagicBell - Android Notifications
Firebase messaging, where to get Server Key? - Stack Overflow
Pusher Beams Docs | Configuring FCM
Firebase Cloud Messaging (FCM) Troubleshooting Guide – Airship Support