Reliable Transactional SMS API for Real-Time Indian Alerts
Integrate a transactional SMS gateway API for OTP verification, order updates and account alerts. Review supported templates, delivery receipts, API request fields and Indian DLT requirements before launch.
POST /api/v1/otp/send HTTP/1.1
Host: nizorasms.com
Authorization: Bearer YOUR_API_KEY
Content-Type: application/json
{
"mobile": "919876543210",
"otp": "492815",
"template_id": "YOUR_APPROVED_OTP_TEMPLATE_ID"
}Built for India's Most Critical Transactional Workflows
From fintech applications to e-commerce notifications, NizoraSMS delivers zero-latency alerts.
Banking & FinTech Alerts
Instant debit, credit, balance updates, and UPI authentication messages delivered with end-to-end cryptographic integrity.
E-Commerce Order Updates
Real-time order placed, packed, dispatched, and out-for-delivery tracking notifications that build customer confidence.
Healthcare & Diagnostics
Appointment reminders, doctor confirmations, and lab report download links sent directly to patient phones.
EdTech & Schools
Attendance alerts, examination schedules, fee payment receipts, and live student bus location links.
Logistics & Ride-Hailing
Driver assignment alerts, OTP verification before parcel handoff, and trip completion receipts.
Identity & 2FA Codes
Two-factor authentication codes for security logins, password resets, and account access authorization.
Frequently Asked Questions — Transactional SMS India
Understand eligible transactional categories, registered headers, delivery status, operator delays and applicable telecom preferences.
What is a transactional SMS API?
It lets an application send event-driven notifications, such as authentication codes and order updates, through a backend request. Message classification and templates must follow applicable rules.
What should a delivery-report integration handle?
Track provider message IDs and status changes, handle delayed callbacks, deduplicate events, log errors without exposing secrets, and set retry rules that avoid sending duplicate customer messages.
Do transactional messages need DLT registration?
Applicable entity, header and content-template registration requirements should be reviewed before sending commercial SMS in India. Confirm the category and exact content with your DLT provider.
How do I reduce failed transactional messages?
Validate recipient numbers, use approved templates, monitor failure codes and retry only when appropriate. Actual delivery depends on operator and recipient conditions.
Is a transactional SMS API suitable for order alerts and account notifications?
Transactional and service messaging can support order status, login alerts or account updates when the applicable content category and approved DLT templates are satisfied. Check the permitted route for the exact use case.
How is delivery status different from OTP verification?
An accepted or delivered SMS status is a messaging event, not proof that a user entered the correct code. Always verify OTPs securely in your own application; use delivery reports only to monitor transport and troubleshoot errors.
Build resilient transactional notifications
Use a unique internal event ID for each message, handle API errors and delivery callbacks, avoid duplicated sends on retries and protect customer phone numbers in logs. Check current DLT rules for your template category.