📱 OTP SMS API Setup Guide for Developers

Complete integration guide for WebShost OTP SMS Service

🚀 How to Setup OTP SMS API in Your Code?

Follow these simple steps to integrate OTP SMS API in your website or application

1 Purchase OTP SMS Credits

Select any plan from our pricing page and complete the purchase. You will receive your unique API Key in your client area.

              📧 API Key: dGVzdF9hcGlfa2V5XzEyMzQ1Njc4OTA=
            

2 Basic PHP Integration Code (Recommended)

Copy and paste this code in your PHP file. Replace YOUR_API_KEY with your actual API key.

<?php
// =============================================
// WEBSHOST OTP SMS API INTEGRATION
// API Endpoint: https://otp.webshost.in/
// =============================================

// Step 1: Get your API Key from client area
$api_key = "YOUR_API_KEY_HERE";

// Step 2: User's mobile number and OTP
$mobile = "1234567890";  // User's phone number (10 digits)
$otp = rand(100000, 999999);    // Generate 6-digit OTP

// Step 3: Prepare API URL with otp.webshost.in domain
$api_url = "https://otp.webshost.in/api-sms-v3.php?api_key=$api_key&number=$mobile&otp=$otp";

// Step 4: SSL context (disable verification for development only)
$context_options = array(
    "ssl" => array(
        "verify_peer" => false,
        "verify_peer_name" => false,
    )
);

// Step 5: Send OTP via API
$response = file_get_contents($api_url, false, stream_context_create($context_options));

// Step 6: Handle response with proper error checking
if ($response === false) {
    die("❌ Error: Unable to connect to OTP API server");
}

// Decode JSON response
$result = json_decode($response, true);

// Check if JSON decode was successful
if (json_last_error() !== JSON_ERROR_NONE) {
    die("❌ Error: Invalid API response format");
}

// Check response status
if(isset($result['status']) && $result['status'] == 'success') {
    echo "✅ OTP sent successfully to $mobile";
    // Store OTP in session for verification
    session_start();
    $_SESSION['otp'] = $otp;
    $_SESSION['mobile'] = $mobile;
    $_SESSION['otp_expiry'] = time() + 300; // 5 minutes expiry
} else {
    $error_msg = isset($result['message']) ? $result['message'] : 'Unknown error';
    echo "❌ Failed to send OTP: " . $error_msg;
}
?>

3 Complete OTP Verification System (PHP + Session)

Full working example with OTP generation, sending, and verification.

<?php
// File: send-otp.php
session_start();

// Configuration
$api_key = "YOUR_API_KEY_HERE";

// Get mobile number from POST request
$mobile = $_POST['mobile'] ?? '';

// Validate mobile number
if(empty($mobile) || !preg_match('/^[0-9]{10}$/', $mobile)) {
    echo json_encode(['status' => 'error', 'message' => 'Invalid mobile number']);
    exit;
}

// Generate 6-digit OTP
$otp = rand(100000, 999999);

// Prepare API URL
$api_url = "https://otp.webshost.in/api-sms-v3.php?api_key=$api_key&number=$mobile&otp=$otp";

// Send request
$context_options = array("ssl" => array("verify_peer" => false, "verify_peer_name" => false));
$response = file_get_contents($api_url, false, stream_context_create($context_options));

if ($response === false) {
    echo json_encode(['status' => 'error', 'message' => 'API connection failed']);
    exit;
}

$result = json_decode($response, true);

// Store OTP in session
if(isset($result['status']) && $result['status'] == 'success') {
    $_SESSION['otp'] = $otp;
    $_SESSION['mobile'] = $mobile;
    $_SESSION['otp_expiry'] = time() + 300; // 5 minutes
    echo json_encode(['status' => 'success', 'message' => 'OTP sent successfully']);
} else {
    $error_msg = $result['message'] ?? 'Failed to send OTP';
    echo json_encode(['status' => 'error', 'message' => $error_msg]);
}
?>

<?php
// File: verify-otp.php
session_start();

$otp = $_POST['otp'] ?? '';
$mobile = $_POST['mobile'] ?? '';

// Check if OTP exists and is not expired
if(isset($_SESSION['otp']) && isset($_SESSION['mobile']) && isset($_SESSION['otp_expiry'])) {
    // Check expiry
    if(time() > $_SESSION['otp_expiry']) {
        echo json_encode(['success' => false, 'message' => 'OTP has expired']);
        exit;
    }
    
    // Verify OTP
    if($_SESSION['otp'] == $otp && $_SESSION['mobile'] == $mobile) {
        // OTP verified - clear session
        unset($_SESSION['otp']);
        unset($_SESSION['mobile']);
        unset($_SESSION['otp_expiry']);
        echo json_encode(['success' => true, 'message' => 'OTP verified successfully']);
    } else {
        echo json_encode(['success' => false, 'message' => 'Invalid OTP']);
    }
} else {
    echo json_encode(['success' => false, 'message' => 'No OTP found. Please request a new one.']);
}
?>

4 JavaScript (AJAX) Integration

For modern websites, use this JavaScript code to send OTP without page refresh.

<script>
// Function to send OTP using AJAX
function sendOTP() {
    var mobile = document.getElementById('mobile').value;
    
    // Validate mobile number
    if(!mobile || mobile.length != 10 || !/^[0-9]+$/.test(mobile)) {
        alert('Please enter a valid 10-digit mobile number');
        return;
    }
    
    // Show loading state
    document.getElementById('sendBtn').disabled = true;
    document.getElementById('sendBtn').innerHTML = '⏳ Sending...';
    
    // Send AJAX request
    fetch('send-otp.php', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/x-www-form-urlencoded'
        },
        body: 'mobile=' + mobile
    })
    .then(response => response.json())
    .then(data => {
        if(data.status == 'success') {
            document.getElementById('message').innerHTML = 
                '<div class="alert alert-success">✅ OTP sent successfully! Check your mobile.</div>';
            // Enable OTP input field
            document.getElementById('otp').disabled = false;
            document.getElementById('verifyBtn').disabled = false;
            // Start timer for resend
            startTimer(60);
        } else {
            document.getElementById('message').innerHTML = 
                '<div class="alert alert-danger">❌ ' + data.message + '</div>';
        }
    })
    .catch(error => {
        document.getElementById('message').innerHTML = 
            '<div class="alert alert-danger">❌ Error: ' + error.message + '</div>';
    })
    .finally(() => {
        document.getElementById('sendBtn').disabled = false;
        document.getElementById('sendBtn').innerHTML = '📤 Send OTP';
    });
}

// Function to verify OTP
function verifyOTP() {
    var mobile = document.getElementById('mobile').value;
    var otp = document.getElementById('otp').value;
    
    if(!otp || otp.length != 6) {
        alert('Please enter 6-digit OTP');
        return;
    }
    
    document.getElementById('verifyBtn').disabled = true;
    document.getElementById('verifyBtn').innerHTML = '⏳ Verifying...';
    
    fetch('verify-otp.php', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/x-www-form-urlencoded'
        },
        body: 'mobile=' + mobile + '&otp=' + otp
    })
    .then(response => response.json())
    .then(data => {
        if(data.success) {
            document.getElementById('message').innerHTML = 
                '<div class="alert alert-success">✅ OTP Verified Successfully!</div>';
            // Redirect or show success page
            setTimeout(() => {
                window.location.href = 'dashboard.php';
            }, 2000);
        } else {
            document.getElementById('message').innerHTML = 
                '<div class="alert alert-danger">❌ ' + data.message + '</div>';
        }
    })
    .catch(error => {
        document.getElementById('message').innerHTML = 
            '<div class="alert alert-danger">❌ Error: ' + error.message + '</div>';
    })
    .finally(() => {
        document.getElementById('verifyBtn').disabled = false;
        document.getElementById('verifyBtn').innerHTML = '✅ Verify OTP';
    });
}

// Timer function for resend
function startTimer(seconds) {
    var btn = document.getElementById('sendBtn');
    btn.disabled = true;
    var timer = setInterval(function() {
        seconds--;
        btn.innerHTML = '⏳ Resend in ' + seconds + 's';
        if(seconds <= 0) {
            clearInterval(timer);
            btn.disabled = false;
            btn.innerHTML = '📤 Resend OTP';
        }
    }, 1000);
}
</script>

5 Complete HTML Form

Ready-to-use HTML form with OTP verification.

<!DOCTYPE html>
<html>
<head>
    <title>OTP Verification - WebShost</title>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css">
</head>
<body>
    <div class="container mt-5">
        <div class="row justify-content-center">
            <div class="col-md-6 col-lg-4">
                <div class="card shadow">
                    <div class="card-body p-4">
                        <h4 class="text-center mb-4">📱 OTP Verification</h4>
                        
                        <div id="message"></div>
                        
                        <div class="mb-3">
                            <label class="form-label">Mobile Number</label>
                            <input type="tel" id="mobile" 
                                   class="form-control"
                                   placeholder="Enter 10-digit number"
                                   maxlength="10" required>
                        </div>
                        
                        <button id="sendBtn" class="btn btn-primary w-100" 
                                onclick="sendOTP()">
                            📤 Send OTP
                        </button>
                        
                        <hr>
                        
                        <div class="mb-3">
                            <label class="form-label">Enter OTP</label>
                            <input type="text" id="otp" 
                                   class="form-control"
                                   placeholder="Enter 6-digit OTP"
                                   maxlength="6" disabled>
                        </div>
                        
                        <button id="verifyBtn" class="btn btn-success w-100" 
                                onclick="verifyOTP()" disabled>
                            ✅ Verify OTP
                        </button>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
    <script>
    // Add JavaScript functions here (from Step 4)
    </script>
</body>
</html>

6 Node.js Integration

For Node.js applications, use this code.

// Node.js with axios
const axios = require('axios');

// Configuration
const API_KEY = 'YOUR_API_KEY_HERE';
const API_URL = 'https://otp.webshost.in/api-sms-v3.php';

// Function to send OTP
async function sendOTP(mobile, otp) {
    try {
        const response = await axios.get(API_URL, {
            params: {
                api_key: API_KEY,
                number: mobile,
                otp: otp
            },
            httpsAgent: new (require('https').Agent)({ rejectUnauthorized: false })
        });
        
        return response.data;
    } catch (error) {
        console.error('Error sending OTP:', error.message);
        return { status: 'error', message: error.message };
    }
}

// Express.js route example
const express = require('express');
const app = express();
app.use(express.json());

app.post('/api/send-otp', async (req, res) => {
    const { mobile } = req.body;
    
    // Validate mobile
    if (!mobile || !/^[0-9]{10}$/.test(mobile)) {
        return res.status(400).json({ status: 'error', message: 'Invalid mobile number' });
    }
    
    // Generate OTP
    const otp = Math.floor(100000 + Math.random() * 900000);
    
    // Send OTP
    const result = await sendOTP(mobile, otp);
    
    if (result.status === 'success') {
        // Store OTP in session/database
        res.json({ status: 'success', message: 'OTP sent successfully' });
    } else {
        res.status(500).json(result);
    }
});

app.listen(3000, () => {
    console.log('Server running on port 3000');
});

7 Python Integration

For Python applications, use this code.

# Python with requests
import requests
import random
import json

# Configuration
API_KEY = "YOUR_API_KEY_HERE"
API_URL = "https://otp.webshost.in/api-sms-v3.php"

def send_otp(mobile, otp):
    """Send OTP to mobile number"""
    params = {
        'api_key': API_KEY,
        'number': mobile,
        'otp': otp
    }
    
    try:
        response = requests.get(API_URL, params=params, verify=False)
        response.raise_for_status()
        return response.json()
    except requests.exceptions.RequestException as e:
        return {'status': 'error', 'message': str(e)}

# Flask example
from flask import Flask, request, jsonify, session
import time

app = Flask(__name__)
app.secret_key = 'your-secret-key-here'

@app.route('/api/send-otp', methods=['POST'])
def send_otp_route():
    data = request.get_json()
    mobile = data.get('mobile', '')
    
    # Validate mobile
    if not mobile or not mobile.isdigit() or len(mobile) != 10:
        return jsonify({'status': 'error', 'message': 'Invalid mobile number'}), 400
    
    # Generate OTP
    otp = random.randint(100000, 999999)
    
    # Send OTP
    result = send_otp(mobile, otp)
    
    if result.get('status') == 'success':
        # Store OTP in session
        session['otp'] = otp
        session['mobile'] = mobile
        session['otp_expiry'] = time.time() + 300
        return jsonify({'status': 'success', 'message': 'OTP sent successfully'})
    else:
        return jsonify(result), 500

@app.route('/api/verify-otp', methods=['POST'])
def verify_otp_route():
    data = request.get_json()
    mobile = data.get('mobile', '')
    otp = data.get('otp', '')
    
    # Check if OTP exists in session
    if 'otp' not in session or 'mobile' not in session:
        return jsonify({'success': False, 'message': 'No OTP found'}), 400
    
    # Check expiry
    if time.time() > session.get('otp_expiry', 0):
        session.clear()
        return jsonify({'success': False, 'message': 'OTP has expired'}), 400
    
    # Verify OTP
    if session['otp'] == int(otp) and session['mobile'] == mobile:
        session.clear()
        return jsonify({'success': True, 'message': 'OTP verified successfully'})
    else:
        return jsonify({'success': False, 'message': 'Invalid OTP'}), 400

if __name__ == '__main__':
    app.run(debug=True, port=5000)

⚠️ Important Notes for Developers

🔑 API Key: Always keep your API key secure. Never expose it in client-side code.
⏰ OTP Expiry: Store OTP in session/database with 5-10 minutes expiry time.
🛡️ Rate Limiting: Implement rate limiting to prevent abuse (max 5 attempts per minute).
📱 Mobile Format: Indian mobile numbers should be 10 digits without country code.
🔒 HTTPS: Always use HTTPS for API calls in production.
📊 Tracking: Use the client area to track your OTP delivery history.
🔄 Retry Logic: Implement retry mechanism for failed API calls (max 3 retries).
📝 Logging: Log all OTP requests and responses for debugging purposes.
🌐 API Endpoint: Always use https://otp.webshost.in/ for production.

📊 API Response Examples

✅ Success Response:

                  {
                  "status": "success",
                  "message": "OTP sent successfully",
                  "sms_id": "SMS_20250222_12345"
                  }
                

❌ Error Response:

                  {
                  "status": "error",
                  "message": "Invalid API key",
                  "error_code": "AUTH_001"
                  }
                

✅ Quick Setup Checklist

☐ Purchase OTP SMS credits
☐ Get API Key from client area
☐ Copy PHP integration code
☐ Replace YOUR_API_KEY with actual key

☐ Test OTP sending functionality
☐ Implement OTP verification
☐ Add rate limiting
☐ Go live with production setup

💬 Need Help?

Contact our support team at support@webshost.com or visit our client area for API documentation.

🌐 API Endpoint: https://otp.webshost.in/api-sms-v3.php

OTP SMS Service in India

📱 OTP SMS API Setup Guide for Developers

🚀 How to Setup OTP SMS API in Your Code?

1 Purchase OTP SMS Credits

2 Basic PHP Integration Code (Recommended)

3 Complete OTP Verification System (PHP + Session)

4 JavaScript (AJAX) Integration

5 Complete HTML Form

6 Node.js Integration

7 Python Integration

⚠️ Important Notes for Developers

📊 API Response Examples

✅ Quick Setup Checklist

💬 Need Help?

What’s Included with Every OTP SMS Plan

Fast & Secure OTP Delivery

No DLT Registration Required

All India Network Coverage

Easy API Integration

Real-Time Tracking & Logs

Dedicated Support & Control Panel

Why Choose Our OTP SMS Service?

Reliable OTP SMS Delivery You Can Trust

Nationwide OTP Delivery

Powerful SMS API Integration

24/7 Support for Your OTP SMS Needs

What is an OTP SMS Service?

Easy Integration for Websites & Apps

Got Questions About OTP SMS? We’ve Got Answers

OTP SMS Service in India

📱 OTP SMS API Setup Guide for Developers

🚀 How to Setup OTP SMS API in Your Code?

1 Purchase OTP SMS Credits

2 Basic PHP Integration Code (Recommended)

3 Complete OTP Verification System (PHP + Session)

4 JavaScript (AJAX) Integration

5 Complete HTML Form

6 Node.js Integration

7 Python Integration

⚠️ Important Notes for Developers

📊 API Response Examples

✅ Quick Setup Checklist

💬 Need Help?

What’s Included with Every OTP SMS Plan

Fast & Secure OTP Delivery

No DLT Registration Required

All India Network Coverage

Easy API Integration

Real-Time Tracking & Logs

Dedicated Support & Control Panel

Why Choose Our OTP SMS Service?

Reliable OTP SMS Delivery You Can Trust

Nationwide OTP Delivery

Powerful SMS API Integration

24/7 Support for Your OTP SMS Needs

What is an OTP SMS Service?

Easy Integration for Websites & Apps

Got Questions About OTP SMS? We’ve Got Answers

What is OTP SMS service?

Do I need DLT registration?

How fast is OTP delivery?

Can I integrate OTP SMS API into my website or app?

Can I track OTP messages?

Is this service secure?

Do you provide support?