Providers

Connect external services to a realm: file storage backends and push notification providers.

backd talks to outside services through providers you configure per realm. The two families are independent: they answer different settings, hold different credentials and share nothing.

Family	Declared in	For	Pages
File storage	`storage:` in `realm.yaml`	a realm’s own S3-compatible bucket, holding the files its documents carry	connecting it, then MinIO, AWS S3, Cloudflare R2 or DigitalOcean Spaces
Push notifications	`push:` in `realm.yaml`	sending a notification to a user’s devices, one provider per platform	FCM (Android, iOS on the FCM SDK), APNs (iOS), Web Push (browsers), local development

Email delivery is declared in the realm’s email: settings — see Email for how functions send it.

Connecting storage

storage: in realm.yaml, the access keys as realm secrets, the prefix each backd instance needs, and backd storage check.

Push providers

The senders a realm uses to reach devices: FCM, APNs and Web Push, plus the capture provider for development.