FCM Documentation & Guides
Original guides for testing Firebase Cloud Messaging HTTP v1 — setup, OAuth tokens, device tokens, and troubleshooting.
Last updated: May 2026
Browse step-by-step articles written for TestFCM.in users. Each guide includes screenshots and illustrations to help you configure and test push notifications without a custom backend.
Complete Guide to Testing FCM Push NotificationsLearn how to test Firebase Cloud Messaging (FCM) HTTP v1 push notifications end-to-end using TestFCM.in — from project setup to delivery on real devices.
12 min read →
FCM HTTP v1 Setup for Firebase ProjectsHow to configure Firebase Cloud Messaging HTTP v1, enable required APIs, and prepare credentials for sending push notifications.
8 min read →
How to Get an OAuth Access Token for FCMStep-by-step instructions to generate a valid ya29 OAuth token using Google Cloud SDK for FCM HTTP v1 API calls.
6 min read →
How to Get the FCM Device Registration TokenPlatform-specific guide to retrieving the FCM registration token from Android, iOS, and web apps for push notification testing.
9 min read →
Common FCM HTTP v1 Errors and FixesTroubleshoot 401, 403, 404, and invalid-argument errors when sending Firebase Cloud Messaging notifications.
10 min read →
Testing Push Notifications on AndroidAndroid-specific checklist for FCM integration, notification channels, and debugging with Logcat.
7 min read →
Testing Push Notifications on iOSiOS-specific guide for APNs configuration, entitlements, and verifying FCM delivery on iPhone and iPad.
7 min read →
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