The #1 Most Reliable SMS API · since 2004

SMS API
SMS Marketing Platform
Bulk SMS

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SMS
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Balance
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SMS versturen Nieuw bericht
VIP klanten 847 NL Prospects 312 +
Hallo [FIRSTNAME], uw bestelling #4827 staat klaar voor afhaling vandaag tussen 09:00 en 18:00. Bedankt!
Inclusief [FIRSTNAME], [CUSTOM1] 126 / 160 · 1 SMS
Bezorgd in 1,4s
Proximus · BE
SMS · WhatsApp · Voice
Trusted by thousands of European businesses, since 2004
Deli XL
Glowi
VOKA
Sylvester Productions
Belfius Insurance
Mathieu Gijbels

Products

One platform, every channel. SMS, WhatsApp, voice and more — for developers via API and business teams via the online platform.

Click a tab to explore the product
For developers

REST API in 5 languages

Official SDKs for PHP, Node.js, Ruby, Python and PowerShell. Delivered in < 2 seconds to 200+ countries with 99.99% uptime SLA.

  • REST + webhooks for inbound SMS
  • Priority routing for OTP & 2FA
  • Production-ready within 5 minutes
View API documentation →
api.smsgatewayapi.com
// Send an SMS
curl -X POST "api.smsgatewayapi.com/v1/message/send"
  -H "X-Client-Id: $ID"
  -H "X-Client-Secret: $SECRET"
  -d '{
    "message": "Hello from Smstools!",
    "to": "+32475123456",
    "sender": "Smstools"
  }'

// → 200 OK delivered in 1.4s ✓

Solutions

A solution for every challenge. From marketing campaigns to crisis communication — six ready-to-use solutions you can start with today.

Marketing

SMS Marketing

Reach customers directly with a 98% open rate. Segment audiences, personalise messages and measure results in real time.
Volume

Bulk SMS

Send thousands of messages in seconds. Perfect for newsletters, announcements and large campaigns with high delivery rates.
WhatsApp

WhatsApp Newsletter

Reach customers on their preferred channel. Send templates and updates directly to WhatsApp — official Meta Tech Partner.
WhatsApp

WhatsApp Marketing

Two-way conversations, automated flows and campaigns. Combine SMS and WhatsApp for maximum customer reach — official Meta Tech Partner.
Emergencies

Crisis Communication

Reach 10,000+ people in seconds during emergencies. Proven by governments, municipalities and critical services.
Authentication

OTP SMS

Secure 2FA codes without app installation. Priority routing and delivery guarantee for logins, transactions and critical actions.

Sectors

Trusted across every industry. From retail to sports clubs — Smstools is used in sectors where reliable communication is critical.

Retail

Orders & customer service

Software Developers

SMS API integration

Financial Institutions

2FA & transaction alerts

Government

Citizen communication

Schools

Schools, parents, students

Job Planners

Employees & teams

Events & Nightlife

Tickets & updates

Restaurants

Reservations & guests

Healthcare

Appointments & reminders

Sport Teams

Training & matches
Why SMS?

The most-read messaging channels in the world

SMS and WhatsApp achieve open rates no other digital channel can match. Independent research confirms these patterns time and again — that is why critical industries choose mobile messaging.

20+
Years of experience
On the market since 2004
10.000+
Active users
Across Europe
99,99%
Uptime SLA
Guaranteed availability
200+
Countries reachable
Worldwide network
View customer stories
Integrations

Connected to the tools you use today

Connect directly to your CRM, helpdesk, planning, marketing and e-commerce. 50+ native integrations, plus Zapier, Make and n8n for the rest.

All integrations →
For developers

REST API + 50+ integrations

Simple REST API with SDKs for PHP, Node.js, Ruby, Python and PowerShell. Plus ready-made integrations via Zapier, Make and webhooks.

REST API + SDKs

Official SDKs for PHP, Node.js, Ruby, Python and PowerShell. Production-ready in minutes.

Webhooks

Delivery reports and two-way messages directly in your application. Fully configurable.

Zapier, Make & n8n

Connect SMS to 5,000+ apps without code. Trigger SMS on events in CRM, ATS, webshop or forms — also self-hosted via n8n.

Native integrations

HubSpot, Slack, Microsoft Teams, Teamleader and more. Connect directly to your existing tools.

PHP Node Ruby Python
<?php $ch = curl_init(); $url = "https://api.smsgatewayapi.com/v1/message/send"; $client_id = "XXX"; // Your API key $client_secret = "YYY"; // Your API secret $data = [ 'message' => "Hello World", //Message 'to' => "11231231234", //Receiver 'sender' => "YourName" //Sender ]; curl_setopt($ch, CURLOPT_URL, "$url"); curl_setopt($ch, CURLOPT_POST, true); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_HTTPHEADER, [ "X-Client-Id: $client_id", "X-Client-Secret: $client_secret", "Content-Type: application/json", ]); curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data)); $response = curl_exec($ch); ?>
Webhook payload
// POST to your webhook URL on every event { "event": "message.delivered", "timestamp": "2026-05-16T14:32:01Z", "message": { "id": "msg_8f3a2c", "to": "+32475123456", "from": "Smstools", "status": "delivered", "operator": "Proximus", "latency_ms": 1247, "parts": 1 } } // Events: sent, delivered, failed, received
Z
Zapier flow
New order → Send SMS
Active
1. Trigger
Shopify · New order
2. Action
Smstools · Send SMS
{firstname}, order shipped ✓
Zapier
or
Make
or
n8n
· 5.000+ apps
Native integrations
H
HubSpot
CRM trigger SMS
#
Slack
SMS to channel
T
MS Teams
Channel notifications
Tl
Teamleader
CRM trigger SMS
SH
Shopify
Order & cart events
+50
All integrations
All integrations →
50+ Integrations
Works with the tools you already use
Zapier
Make
n8n
H HubSpot
# Slack
T Teams
All integrations

Your customer data stays secure in Europe

All our servers are located in Europe. GDPR-compliant, with Data Processing Agreement on request.

GDPR-compliant
Full compliance with European privacy legislation.
EU Hosting
Servers in Europe, no US-cloud.
DPA available
Data Processing Agreement available on request.
10K+ active users
Companies worldwide trust the platform.
Uptime 99.99%
Guaranteed availability via redundant infrastructure.
GDPR · EU-only data
Client
TLS 1.3
EU servers
AES-256
Storage
Compliance certificates
GDPR EU Hosting TLS 1.3 99,99% SLA
Customer stories

How businesses use Smstools

Real-world examples from retail, healthcare, finance, government, education and hospitality.

📦 Bestelling #4827
Verzonden! Track:
bpost.be/4827
Levering vandaag
14u-16u
Bezorgd · 1,3s
🛒
#4827
€89,50
Retail

Order and delivery confirmations

Webshops automatically send an SMS with every new order including track & trace link. 98% open rate within 3 minutes.

View example
🏥 Praktijk Janssens
Herinnering: afspraak morgen 09:00
Antwoord: JA bevestigen
NEE annuleren
JA
Bezorgd · 1,5s
MEI
17
09:00
Healthcare

Appointment reminders

Hospitals, practices and municipalities reduce no-shows by up to 60% with automatic SMS reminders at T-24h and T-1h.

View example
🔐 Uw verificatiecode

837 492

Geldig 5 min · Deel nooit
Priority · 0,8s
2FA verified
Finance

2FA & OTP authentication

Banks and insurers use priority routing for login codes with delivery guarantee within 2 seconds.

View example
⚠️ Gemeente alert
Wateroverlast verwacht in uw zone vanaf 16:00.

Volg updates:
gemeente.be/alert
10.247 verzonden · 4s
Verzonden
10.247
Government

Citizen communication & crisis alerts

Municipalities inform citizens about collection days, events and crisis situations. 10,000+ messages in seconds.

View example
🎓 VBS De Linde
Beste ouder, les wiskunde van morgen wordt verplaatst naar vrijdag 10u30.

Met vriendelijke groeten
Aan 342 ouders · 2s
👨‍👩‍👧
Ouders
342
Education

Reaching parents and pupils

Schools send timetable changes, absence notifications and event info directly by SMS — no email getting buried.

View example
🍽️ Bistro Centro
Reservatie bevestigd!

Zaterdag 18 mei · 19:30
4 personen · tafel 7

Annuleren? Antwoord STOP
Bedankt! 🙏
Bezorgd · 1,2s
🍷
Tafel 7
19:30 · 4 pers.
Hospitality

Confirming reservations

Restaurants and hotels confirm reservations, send reminders and request feedback after the visit — all automatically.

View example
View all customer stories →
Transparent pricing

Simple SMS pricing, no surprises

SMS to Belgium
From
0,06 € / message
No setup or licence costs Volume-based discounts
View all pricing →
Try for free → Request a quote Contact
FAQ

Frequently Asked Questions

Question not answered? Our support team is ready to help.

Contact Support
How quickly can I get started with the SMS API?
You can get started within a few minutes. Create a free test account, immediately receive your API key and integrate our SMS API using SDKs for PHP, Node.js, Python and Java.
Does Smstools support only SMS, or also WhatsApp?
In addition to SMS, we also support the WhatsApp Business API for two-way messaging, notifications and automated customer communication.
In which countries can I send SMS with Smstools?
We provide coverage in over 200 countries via direct operator connections — suitable for European and international campaigns.
Is Smstools GDPR compliant?
Yes. Our processes are GDPR compliant and data is securely stored within the EU under the strictest privacy standards.
How much does it cost to send an SMS?
The price per SMS varies by country and volume. See our pricing page for full details per country and contact us for a custom quote at sales@smstools.com
Which programming languages does the Smstools API support?
We provide SDKs and sample code for PHP, Node.js, Ruby, Python and Powershell. See the API documentation for code samples and webhooks.
Discover our SMS marketing platform today!

Sending SMS has never been this easy.

REGISTER → Contact