How It Works
Get started in three simple steps
1
Download the App
Install SMSTunnel on any Android phone with an active SIM card. The app runs in the background and maintains a constant connection to our servers.
Get on Google Play2
Get Your API Key
Sign up for a free account and generate your API key from the dashboard. Pair your phone with your account using a QR code.
Create Account →3
Start Sending
Use our REST API or WordPress plugins to send SMS from your applications. Messages are delivered instantly through your phone.
Read Documentation →System Architecture
💻
Your App
Website, CRM, etc.
→
☁️
SMSTunnel API
Secure cloud service
→
📱
Your Phone
Android + SIM card
→
👤
Recipient
Gets the SMS
Simple API Integration
// Send SMS with a single API call
curl -X POST https://smstunnel.io/api/v1/sms/send \
-H "X-API-Key: your_api_key" \
-H "Content-Type: application/json" \
-d '{
"phoneNumber": "+40712345678",
"message": "Your verification code is: 123456"
}'
// Response
{
"success": true,
"messageId": "msg_abc123",
"status": "queued"
}Popular Use Cases
🔐
Two-Factor Auth
Send OTP codes for login verification and secure transactions.
📦
Order Updates
Notify customers about order status, shipping, and delivery.
📅
Appointments
Send reminders for appointments, bookings, and reservations.
📢
Notifications
Alert users about important events, updates, or promotions.
Start Your Free Trial →
No credit card required. 10 free SMS per day.