SMS API of Belgian origin
The SMSBOX SMS API is a REST API that lets you send and receive SMS messages from your own software — with direct Belgian operator connections and delivery in more than 200 countries. A single HTTP request is enough to send a message.
You only pay per message sent, from €0.06 per SMS, without a subscription or setup costs. Want to know more about sending SMS in general, or start straight away with SMS verification?
curl -X POST https://core.smsbox.be/api/v2/message/send \ -H "X-Api-Key: UW_API_KEY" \ -d "mobile=32496123456" \ -d "message=Uw bestelling is onderweg" Why the SMSBOX API?
Direct operator connections
Direct links with the Belgian operators: 98% open rate within 3 minutes.
GDPR & Belgian data centres
100% GDPR compliant, all servers in Belgian data centres, 99.99% uptime.
No subscription
Pay only per SMS sent, from €0.06 — no setup costs or fixed costs.
Operational in 2 minutes
Create an account, copy the API key, send your first SMS — you can test right away.
Everything in one API
Sending SMS
Single messages or campaigns, with scheduling and personalization.
OTP verification
Send one-time codes via /v2/otp/send and verify them free of charge via /v2/otp/verify.
HLR / number validation
Check whether a number is valid and active before you send.
Voice
Have your message read out as a voice message (text-to-speech).
Inbound SMS via webhook
Receive incoming messages straight into your software via an HTTPS webhook.
Delivery reports
Real-time delivery statuses per message via webhooks to your own endpoint.
Operational in 3 steps
- Create a free account — Create a free SMSBOX account, without a subscription, setup costs or credit card.
- Create an API key — Generate your personal API key in the customer portal.
- Send your first SMS — Send your first message via the REST API or the official PHP SDK — operational in 2 minutes.
SDK & integrations
The REST API works with every programming language; there are code examples for PHP, Python, Node.js, Ruby, C#, PowerShell and cURL. For PHP there is an official open source SDK on GitHub. Prefer not to write code? Then use a ready-made integration.
Ready to build?
The API documentation lists all endpoints, parameters and response codes, with code examples per language — from your first message to webhooks for inbound SMS and delivery reports.
