PhoneCall AI

Made for Cambodia

Free SMS OTP Verification API

Send verification codes via SMS using Cambodia's Smart, Cellcard, and Metfone SIM infrastructure. Secure, fast, and affordable.

SMS OTP code using your own SIM Card. Contact admin: nhemlos

Start Free → Learn More

Why Choose PhoneCall AI?

🇰🇭

Cambodia Optimized

Smart, Cellcard, and Metfone SIM detection with automatic carrier matching for reliable delivery.

🔒

Enterprise Security

Rate limiting, IP tracking, input sanitization, and secure token authentication.

⚡

Instant Setup

Two API calls. Send OTP, verify OTP. No complex configuration needed.

💰

Low Cost

Free tier available. Pay only for what you use. No hidden fees.

📱

Dual SIM Support

Automatically uses the correct SIM card for each carrier network.

🛡️

Anti-Abuse

Per-phone rate limits and IP-based throttling prevent spam and fraud.

How It Works

Send Request

User enters phone number on your website. Call our API to send OTP.

Receive SMS

User receives 6-digit code via SMS from Cambodia SIM card.

Verify Code

User enters code. Call our API to verify. Done!

Integrate in Minutes

                // Step 1: Send OTP

                const res = await fetch('https://backend-lime-three-82.vercel.app/api/otp/send', {

                  method: 'POST',

                  headers: { 'Content-Type': 'application/json' },

                  body: JSON.stringify({

                    phone_number: '+85512345678',

                    purpose: 'register',

                    site_name: 'MyShop'

                  })

                });

                // Step 2: Verify OTP

                const verify = await fetch('https://backend-lime-three-82.vercel.app/api/otp/verify', {

                  method: 'POST',

                  body: JSON.stringify({

                    phone_number: '+85512345678',

                    otp_code: '123456',

                    purpose: 'register'

                  })

                });

Free to Use

No hidden fees. Contact us to get started.

Free

Forever

All carriers supported
Basic rate limiting
Email support

Get API Key

Contact Us

Custom

Need more?

Higher limits
Custom features
Priority support
Dedicated SIM pool

Contact Support

Enterprise

Custom

Volume needs

Unlimited OTPs
SLA guarantee
24/7 phone support
Custom integration

Contact Sales

Enterprise-Grade Security

🔐

HTTPS Encryption

All API calls encrypted with TLS. Your data is always secure.

🛡️

Rate Limiting

Per-IP and per-phone limits prevent abuse and fraud.

📝

Audit Logging

Every request logged with IP, timestamp, and device info.

🗑️

Auto-Cleanup

Expired OTPs automatically deleted. No data retention.