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OTP & Two-Factor Authentication SMS for Nigeria — Delivered in Under 3 Seconds
Sendar is an OTP SMS service provider in Nigeria that delivers one-time password verification codes and two-factor authentication messages to any mobile number across MTN, Airtel, Glo, and 9Mobile — including phones on the NCC Do-Not-Disturb registry. OTP messages cost ₦6.65 each with sub-3-second delivery, automatic retry on failure, and real-time delivery receipts via webhook or dashboard. The service is accessible through a REST API with official SDKs for Python, Node.js, PHP, and Java.
Why OTP Needs a Dedicated Route
Authentication codes demand speed, reliability, and guaranteed delivery. Generic SMS routes are not enough.
DND Bypass Delivery
OTP routes are NCC-approved for delivery to DND numbers. Every verification code reaches the recipient regardless of their Do-Not-Disturb status.
Sub-3-Second Speed
Dedicated low-latency gateway prioritises OTP traffic over all other message types, ensuring codes land in under 3 seconds on average.
Automatic Retry Logic
Failed deliveries are retried up to 3 times automatically across alternate carrier routes — no manual intervention required.
One-Time Expiry
Codes expire after a configurable window (default 5 minutes). Once used or expired, the code is invalidated and cannot be reused.
Real-Time Webhooks
Instant delivery status callbacks to your server — sent, delivered, or failed — so your application always knows the current state.
All Four Carriers
Direct routes to MTN, Airtel, Glo, and 9Mobile with carrier-level redundancy. If one route slows, traffic shifts automatically.
How OTP Verification Works
From user action to verified identity in under 5 seconds — here is the full flow.
User requests action
The user initiates a login, signup, payment, or password reset that requires verification.
Your app calls Sendar's OTP API
A single POST request to our OTP endpoint generates a secure code and triggers delivery.
Sendar delivers the code in <3 seconds
The OTP is routed through our dedicated low-latency gateway to the user's phone — DND or not.
User enters the code, your app verifies it
Send the code and reference to our verify endpoint. We return verified or expired — done.
Who Uses OTP SMS in Nigeria
Every industry that needs to verify identity, authorise actions, or secure access relies on OTP SMS.
Fintech & Banking
Login verification, transaction confirmations, fund transfers, and card activation codes.
E-commerce
Account signup verification, payment approvals, delivery confirmation codes, and password resets.
Healthcare
Patient portal access, prescription verification, appointment confirmations, and lab result approvals.
SaaS & Apps
Two-factor authentication, password resets, account recovery, and device verification codes.
Send OTP SMS in minutes — via API or dashboard.
Send OTP in 3 Lines of Code
One endpoint to generate and deliver OTP codes. Automatic retry, real-time webhooks, and a verify endpoint to complete the loop — all from a single REST API.
API DocumentationOTP API endpoint
Generate, deliver, and verify OTP codes with two simple requests.
POST https://api.sendar.io/v1/otp/send
Authorization: Bearer $SENDAR_KEY
Content-Type: application/json
{
"to": "+2348012345678",
"sender_id": "MyApp",
"expiry": 5
}
// 200 OK — OTP delivered in 1.8sOTP SMS Pricing — Pay As You Go
No monthly fees. No contracts. Just top up and start verifying.
OTP SMS
- DND bypass guaranteed
- Sub-3-second delivery
- Real-time delivery receipts
- Automatic retry logic
- Custom sender ID
- REST API + webhooks
Prepay ₦10K – ₦100K+ and unlock 2%, 4% or 6% off every SMS. See full pricing & volume discounts →
OTP SMS Questions
Everything you need to know about sending OTP verification SMS with Sendar in Nigeria.