Replace SMS with something better
Send OTP, transactional, and marketing messages that users actually want to receive. Free up to 5,000 messages/month, then $0.001 each. Flat rate, globally.
Simple REST API
Send messages with a simple POST request. Support for single messages and bulk sending.
Send OTP Code
curl -X POST https://api.getinbox.app/send \
-H "Authorization: Bearer $INBOX_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"to": "+15551234567",
"type": "otp",
"body": {
"code": "123456",
"purpose": "signin",
"expires_at": "2025-12-31T23:59:59Z"
}
}'Bulk Sending
curl -X POST https://api.getinbox.app/send \
-H "Authorization: Bearer $INBOX_API_KEY" \
-H "Content-Type: application/json" \
-d '[
{
"to": "+15550000001",
"type": "otp",
"body": {
"code": "111111",
"purpose": "signin",
"expires_at": "2025-12-31T23:59:59Z"
}
},
{
"to": "+15550000002",
"type": "delivery",
"body": {
"order_id": "A-2",
"status": "shipped"
}
}
]'Rich Message Types
Send structured messages with actions, not just plain text.
OTP Codes
Verification codes with auto-expiry and purpose tracking.
Expires in 5 minutes
Delivery Updates
Package tracking with actionable buttons.
Transactions
Payment alerts with transaction details.
Events
Appointments and reminders with calendar integration.
Info Messages
General updates and notifications.
Promotions
Marketing messages with discount codes.
Everything you need to send better messages
Cost Effective
Free up to 5,000 messages/month per org. Beyond that, $0.001 each. Flat rate, globally.
Analytics & Receipts
Track delivery, read receipts, and user actions. Know what's working.
Verification
Get verified to build trust. Blue check badge shows users you're legitimate.
End-to-End Encrypted
Messages are encrypted in transit and at rest. We can't read them, neither can anyone else.
Webhooks
Real-time notifications for message events: sent, delivered, read, action taken.
Global Reach
Send to any phone number worldwide. Pricing varies by country.
Ready to replace SMS?
Start sending better messages today. Free up to 5,000 messages/month.