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Bulk campaigns, notifications, transactional
How to send an SMS?
From a phone, a PC, online or by email
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Text-to-speech, also to landlines
OTP / 2FA
One-time codes for verification
Personalize SMS
Mail merge with %tags% from Excel
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Send at the right moment
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Receive SMS
Real time in your dashboard or webhook
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Belgian mobile number online
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Short number — receive & send via keyword
Number validation
HLR lookup, prevent fraud & costs
Clean up your number list
Bulk HLR on your entire Excel list
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Receive SMS via your own SIM card
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Eight criteria to assess providers
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Pay afterwards & automatic top-up
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Thousands of messages at once, via Excel
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Opt-in, unsubscribe and click tracking
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Upload your list, personalize with %tags%
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Reuse fixed messages per language
Measure clicks
URL shortener with tracking per country
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Appointment reminder
Fewer no-shows with an SMS up front
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Automatically from your own system
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Everyone reached within minutes
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Verify users with one-time codes
Server monitoring
Instant alerts on downtime
SMS conversations
Back-and-forth per customer in one view
Contact management
Groups, Excel import and Entra ID sync
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SMS for webshops
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SMS for schools
SMS for municipalities
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Connect your own software — Belgian REST API
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Official SDK on GitHub
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SMS from an AI assistant — in development
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Google, Microsoft or your own IdP
Tools
Mail2SMS & MailNoti
Send SMS by email
SMS length calculator
Calculate characters & segments
OTP tester
Try the OTP flow live
Glossary
GSM-7, DLR, HLR & 24 other terms
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New
Webshop, CRM, accounting & more
WordPress
Popular
Official plugin: send & receive SMS
WooCommerce
Automate order and shipping notifications
Zapier
Automate without code
Microsoft Teams
New
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Azure / Entra ID
Synchronize your contacts
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SMS alerts on downtime
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SMSBOX
API documentation
Reference
SMS Gateway API — reference documentation
Back to API overview
PHP SDK available
—
composer require smsbox/php-sdk
View on GitHub
-- Choose an endpoint --
POST — SMS bericht versturen (V2)
GET — Inkomende berichten ophalen
GET — Uitgaande berichten ophalen
POST — WhatsApp Business bericht versturen (op aanvraag)
POST — Microsoft Teams bericht versturen (op aanvraag)
GET — Saldo opvragen
POST — OTP versturen (V2)
GET — OTP verifiëren (V2)
GET — Mobiele nummer validatie (HLR lookup)
GET — Nummer omzetten naar internationaal formaat
POST — Voice bericht versturen
GET — Alle contacten ophalen
POST — Contact toevoegen
GET — Contact ophalen op ID
PUT — Contact bewerken
DELETE — Contact verwijderen
GET — Alle groepen ophalen
POST — Groep toevoegen
GET — Groep ophalen op ID
PUT — Groep bewerken
DELETE — Groep verwijderen
GET — API key valideren
POST — Short URL aanmaken met tracking
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