Manage backend services for mobile and web applications. Create, read, update, and delete documents in Cloud Firestore and Realtime Database. Manage user accounts including creating, updating, deleting, and listing users with authentication support. Send push notifications and data messages to devices, topics, and device groups via Cloud Messaging (FCM). Upload, download, and delete files in Cloud Storage. Read and publish Remote Config templates to change app behavior remotely. Deploy and manage serverless Cloud Functions triggered by database events, authentication events, storage events, and HTTP requests. Stream real-time database changes via Server-Sent Events. Query databases with filters, ordering, and pagination. Perform batch writes and transactions in Firestore. Generate and verify custom tokens and ID tokens for user authentication.