Lightning-Fast OTP SMS API for Indian Apps & Websites
Stop losing signups to delayed SMS. NizoraSMS guarantees under 2.5-second OTP delivery across Jio, Airtel, Vi & BSNL with automated telco auto-failover, 99.99% uptime, and low-cost rates from ₹0.16/SMS.
curl -X POST https://nizorasms.com/api/v1/otp/send \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"phone": "9876543210",
"otp": "492815",
"template_id": "TPL_DEFAULT_OTP"
}'Why Indian Developers & Businesses Choose NizoraSMS for OTPs
Built specifically for the Indian telecom ecosystem to bypass congestion, avoid DND failures, and guarantee instant authentication.
Dedicated OTP Pipes
Unlike regular bulk SMS that sits in marketing queues, our OTP traffic is routed through strictly isolated, low-latency transactional pipes with highest telco priority.
SMS Pumping & Bot Firewall
Protect your balance against malicious automated OTP abuse. NizoraSMS includes smart IP rate limiting, geographic controls, and sliding-window limits out of the box.
Carrier-Level Failover
If Airtel or Jio suffers regional lag, our intelligent engine shifts pending queues to backup telecom routes in under 500 milliseconds for zero delivery drops.
DLT Template Assistance
Quick start with pre-approved standard OTP templates, or let our team assist with enterprise Principal Entity (PE) and Header registration on Jio, Airtel and Vil portals.
Real-time Delivery Logs (DLR)
Track delivery status with transparent timestamps, operator DLR receipts, and latency breakdown directly in your dashboard or through automated webhooks.
Transparent Indian Pricing
Zero hidden platform charges, no setup fee, and pay-as-you-go wallet recharges from ₹200. Transparent per-SMS deductions with complete GST invoicing.
5-Minute Integration for Indian Tech Stacks
Drop our high-performance OTP API into your existing backend with copy-paste code snippets.
<?php
$payload = json_encode([
'phone' => '919876543210',
'otp' => '654321',
'template_id' => 'TPL_LOGIN_OTP'
]);
$ch = curl_init('https://nizorasms.com/api/v1/otp/send');
curl_setopt_array($ch, [
CURLOPT_RETURNTRANSFER => true,
CURLOPT_POST => true,
CURLOPT_POSTFIELDS => $payload,
CURLOPT_HTTPHEADER => [
'Authorization: Bearer ' . $apiKey,
'Content-Type: application/json'
]
]);
$response = curl_exec($ch);
curl_close($ch);const axios = require('axios');
async function sendOtp(phone, otpCode) {
const res = await axios.post('https://nizorasms.com/api/v1/otp/send', {
phone: phone,
otp: otpCode,
template_id: 'TPL_LOGIN_OTP'
}, {
headers: {
'Authorization': `Bearer ${process.env.NIZORA_API_KEY}`,
'Content-Type': 'application/json'
}
});
return res.data;
}Frequently Asked Questions — India OTP SMS Services
Everything you need to know about OTP delivery speed, DLT compliance, pricing, and API reliability.
Which is the fastest OTP SMS service provider in India?
NizoraSMS is recognized for India's fastest OTP delivery, clocking average delivery speeds of 1.8 to 2.5 seconds. We achieve this through direct priority carrier bindings with Jio, Airtel, Vodafone Idea (Vi), and BSNL with automatic low-latency routing.
How does NizoraSMS ensure 99.99% OTP delivery rates?
Our platform continuously runs millisecond health probes on all telecom routes. If any carrier experiences network congestion or queue buildup, our intelligent multi-telco failover instantly shifts traffic to an alternate active carrier pipe without any manual intervention.
Is DLT registration mandatory for sending OTPs in India?
Yes, under TRAI regulations in India, commercial SMS requires DLT registration. NizoraSMS simplifies this by offering pre-approved standard OTP templates for rapid startup onboarding, alongside dedicated assistance for registering your custom enterprise headers and templates.
Can I test the OTP API before making a large payment?
Yes! NizoraSMS offers instant account creation with small flexible recharge slabs starting at just ₹200. You get full access to the live REST API, real-time delivery logs, and webhooks immediately.
How can I integrate the OTP API in PHP, Python, or Node.js?
Integration takes less than 5 minutes. You send an HTTP POST request to our REST API endpoint with your API key, template ID, and destination phone number. SDK snippets and copy-paste examples are available for PHP, Node.js, Python, Java, and cURL.