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SMS, Push & Real-Time — WhatsApp, FCM, SignalR

Granit.Notifications supports a wide range of delivery channels beyond email. Each channel is registered independently and resolved via Keyed Services. For provider configuration options, see the configuration reference.

SMS

Section titled “SMS”

Providers

Section titled “Providers”

| Provider | Package | Keyed Service key | |----------|---------|-------------------| | Azure Communication Services | Granit.Notifications.Sms.AzureCommunicationServices | "AzureCommunicationServices" | | AWS SNS | Granit.Notifications.Sms.AwsSns | "AwsSns" | | Twilio | Granit.Notifications.Twilio | "Twilio" | | Brevo | Granit.Notifications.Brevo | "Brevo" |

context.Services.AddGranitNotificationsSms(opts => opts.Provider = "Brevo");

WhatsApp

Section titled “WhatsApp”

Providers

Section titled “Providers”

| Provider | Package | Keyed Service key | |----------|---------|-------------------| | Brevo | Granit.Notifications.Brevo | "Brevo" | | Twilio | Granit.Notifications.Twilio | "Twilio" |

context.Services.AddGranitNotificationsWhatsApp(opts => opts.Provider = "Brevo");

Mobile Push

Section titled “Mobile Push”

Providers

Section titled “Providers”

| Provider | Package | Keyed Service key | |----------|---------|-------------------| | Firebase Cloud Messaging (FCM HTTP v1) | Granit.Notifications.MobilePush.GoogleFcm | "GoogleFcm" | | Azure Notification Hubs | Granit.Notifications.MobilePush.AzureNotificationHubs | "AzureNotificationHubs" | | AWS SNS Platform Application | Granit.Notifications.MobilePush.AwsSns | "AwsSns" |

context.Services.AddGranitNotificationsMobilePush(opts => opts.Provider = "GoogleFcm");
context.Services.AddGranitNotificationsMobilePushGoogleFcm();

SignalR

Section titled “SignalR”

Real-time notifications delivered via SignalR hub with optional Redis backplane for multi-instance deployments.

context.Services.AddGranitNotificationsSignalR(
    context.Configuration.GetConnectionString("Redis")!);

Map the hub in your application:

context.App.MapHub<NotificationHub>("/hubs/notifications");

Web Push

Section titled “Web Push”

W3C Web Push (VAPID, RFC 8030/8291/8292) — no dependency on FCM or US cloud providers, European sovereignty by design.

context.Services.AddGranitNotificationsPush();

SSE (Server-Sent Events)

Section titled “SSE (Server-Sent Events)”

Native .NET 10 SSE channel with authentication, per-user connection limits, and bounded message buffers.

context.Services.AddGranitNotificationsSse();

The SSE channel requires authentication (.RequireAuthorization() on the route group) and enforces per-user connection limits to prevent resource exhaustion. When the limit is reached, the endpoint returns 429 Too Many Requests. Message buffers use bounded channels with DropOldest policy.

Zulip

Section titled “Zulip”

Zulip Bot API chat integration for team notifications.

context.Services.AddGranitNotificationsZulip();

See also

Section titled “See also”