Bulk SMS API · Live Live
Bulk SMS API Built for Controlled Scale
Send large recipient batches without tying up your application. Alert21 accepts validated jobs, processes them asynchronously and reports delivery at message and batch level.
Built for Asynchronous Processing
Large campaigns should be submitted as jobs, queued and processed by workers rather than synchronously forwarded inside one long HTTP request.
Bulk Messaging Features
- Batch identifiers.
- Recipient-specific variables.
- Rate and throughput controls.
- Scheduling.
- Partial acceptance/rejection reporting.
- Per-message delivery status.
- Campaign analytics.
- Suppression controls.
Use Cases
- Operational announcements.
- Service reminders.
- School or institutional communication.
- Customer lifecycle updates.
- Permission-based marketing campaigns.
Scale Without Losing Control
Alert21 should apply account-level throughput, compliance checks and abuse monitoring even when traffic is high volume. Bulk should mean efficient processing — not weaker policy controls.
EVERY ALERT. ONE API.
Turn your next business event into a traceable alert.
Start with DLT-ready SMS today on Alert21’s developer-first communication platform.