SMS OTP Services - The Standard for Verification

Why SMS OTP?

SMS OTP (One-Time Password) remains the most widely used method for Two-Factor Authentication (2FA) and user verification globally. Its universality is its greatest strength.

Unlike app-based solutions or internet-dependent messaging platforms, SMS works on every mobile phone, from the latest smartphones to basic feature phones. This ensures 100% addressable market coverage for your application. Whether you are onboarding a user in New York or a remote village in India, SMS OTP gets the job done.

Key Benefits

Why SMS OTP is essential for your business

No Internet Required

SMS relies on cellular networks, not data. This means users can receive OTPs even in areas with poor or no internet connectivity, ensuring you never lose a user due to connection issues.

Universal Reach

Every mobile phone can receive SMS. There is no app to install, no account to create, and no barrier to entry. It is the most inclusive verification method available.

Intelligent Routing

Our platform uses AI-driven routing to select the best carrier path for every message, ensuring the fastest delivery and highest success rates.

Sender ID Branding

Send messages from a recognizable Sender ID (e.g., "HANUOTP") instead of a random number, increasing trust and brand recognition.

Low Latency

Time is money. Our direct operator connections ensure that OTPs are delivered in seconds, preventing user frustration and abandonment.

Fraud Protection

Built-in safeguards against SMS pumping and toll fraud protect your budget while ensuring legitimate users get verified.

The SMS Delivery Process

1

Trigger Event

A user action (registration, login, transaction) triggers the need for verification in your system.

2

Secure Processing

Your backend calls our API. We validate the request, generate/validate the OTP, and select the optimal route.

3

Carrier Handover

We pass the message to the telecom operator via high-priority transactional routes dedicated to OTPs.

4

User Receipt

The user receives the SMS instantly on their device and enters the code to proceed.

Drop-in Integration

Get up and running in minutes. Our REST API is designed for simplicity and reliability.

View Full Documentation

sms_integration.py

import requests

def send_sms_otp(phone, otp):
    url = "https://api.hanuotp.in/sms-otp.php"
    params = {
        "apikey": "YOUR_API_KEY",
        "number": phone,
        "OTP": otp
    }
    
    try:
        response = requests.get(url, params=params)
        response.raise_for_status()
        print("SMS Sent:", response.json())
        return response.json()
    except Exception as e:
        print("Error:", e)
        return None

# Send an OTP
send_sms_otp("919876543210", "876543")

Frequently Asked Questions

Common questions about SMS OTP

Pricing varies by country and volume. We offer competitive pay-as-you-go rates with no hidden fees. Check our dashboard for specific country rates.

For sending SMS in India, Distributed Ledger Technology (DLT) registration is mandatory by TRAI. We assist you in getting your headers and templates approved to ensure seamless delivery.

We target sub-5-second delivery for 90% of messages. Our direct operator connections minimize latency.

This service is primarily for transactional OTPs. Promotional SMS has different regulations and routes. Please contact sales for promotional messaging needs.

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