SMS API for Developers - SMS Gateway with 100 Free Messages to Get You Started

Integrate SMS sending in your app in minutes. ACTIO SMS API: REST, JSON, verification codes, notifications. 100 SMS to start with - no credit card required.

SMS integration in your application - simple, fast, reliable

Are you building a notification system, two-factor authentication (2FA) or automatic alerts for customers? ACTIO's SMS API is an SMS gateway ready to be integrated in a dozen or so minutes - with documentation in Polish and 100 free messages to start with, without a credit card.

What is SMS API?

An SMS API (Application Programming Interface) is an interface that allows your application, CRM, e-commerce platform, or backend script to send and receive SMS programmatically - no panel, no clicking, fully automatic.

Instead of handling messages manually, your code sends a single HTTP request and within seconds the SMS reaches the recipient.

Typical uses of SMS API:

Use case	Example
2FA Verification	OTP code at login or payment
Transaction notifications	"Your order has been shipped"
System alerts	Server monitoring, outage alert
Mass SMS	Campaigns, reminders, SMS newsletter
SMS automation	User onboarding, drip SMS

REST API + JSON - zero exotic protocols

Our SMS API is based on standard REST with JSON format. If you know how to do a curl or fetch, you're ready to integrate. No binary protocols, no SOAPs.

curl -X POST https://msg-api.actio.pl/api/sms \
     -H "Authorization: Bearer TWOJ_TOKEN" \
     -H "Content-Type: application/json" \
     -d '{
           "from": "48732129000",
           "to": "48732129001",
           "body": "Test ACTIO"
         }'

The answer in < 200 ms. That's it.

100 SMS free - test without risk

Each new developer account receives 100 free SMS messages to use in the production environment (not a sandbox!). This is enough to:

test end-to-end integration,
verify deliverability in your target network,
show the POC to the customer or team.

No credit card required. No trial period with expiration date.

SMS API Gateway - enterprise-class infrastructure

Direct connections to operators (Orange, Play, T-Mobile, Plus) - without intermediate aggregators
SLA 99.9% uptime
Delivery reports in real time (webhook or polling)
Support for Unicode / emoji and long messages (concatenated SMS)
Sender ID override - your brand instead of a number

What does SMS API sending look like step by step?

Your app
      │
      ▼ POST /sms/send ──▶ ACTIO SMS Gateway ──▶ Operator (Orange/Play/T-Mobile)
      │                                                    │
      └──────────── status: delivered ◀────────────────────┘

You register an account - 2 minutes, no paperwork required
You download the API token from the developer panel
You send your first request - example above
You monitor deliverability via webhook or status endpoint
You scale - from 1 to millions of SMS per month without changing the code

Mass SMS - sending to thousands of recipients with one call

The platform supports both 1:1 (transactional) SMS sending and bulk SMS to entire segments of the contact database.

curl -X POST https://msg-api.actio.pl/api/sms-multi \
     -H "Authorization: Bearer TWOJ_TOKEN" \
     -H "Content-Type: application/json" \
     -d '{
           "from": "48732129000",
           "to": ["48732129001", "48732129002"],
           "body": "Test ACTIO"
         }'

Mass SMS sending with schedule, personalization of variables ({{name}}) and automatic division into batches - all through one API.

SMS API vs SMS VoIP - which should you choose?

If your application already uses VoIP (e.g. for voice calls), ACTIO's SMS API integration is a natural step. You can use the same VoIP number to receive SMS responses (two-way SMS) and make voice calls.

Feature	SMS API	SMS VoIP
Sending SMS from code	✅	✅
SMS reception (inbound)	✅	✅
Voice calls	❌	✅
One number for SMS + voice	❌	✅
Lowest SMS cost	✅	✅

SMS API pricing - transparent rates, no hidden fees

ACTIO is billed for the messages actually sent. No monthly plans, no inactivity fees.

✅ 100 free SMS to start
✅ Package rates - the more you send, the cheaper
✅ No minimum monthly volumes
✅ VAT invoice, payment by bank transfer or card

Check the current SMS API price list →

Security and GDPR compliance

Data processed exclusively on servers in Poland / EU
TLS 1.3 encryption for all API requests
Shipment logs available via API (auditability)
Possibility to sign a data entrustment agreement (DPA)
Compliance with UKE requirements for Polish operators

FAQ: SMS API for developers

Can I test an API without paying?

Yes. 100 SMS free after registration, no credit card required.

How fast will I get an access token?

Immediately after registration - you generate the token yourself in the panel.

Does the API support Unicode messages?

Yes. We automatically detect encoding and inform you about the number of SMS segments.

Can I receive SMS to my number via API (inbound)?

Yes - by setting up a webhook, you will receive a POST with the content of the incoming SMS in real time.

What is the sending limit per minute?

100 SMS/s as standard. Enterprise limits available upon request.

Do you have documentation in Polish?

Yes - full REST API documentation, code samples and SDK available in Polish.

Start now - 100 SMS to start, zero commitment

It takes less than 15 minutes to integrate the ACTIO SMS API. Do you have technical questions? Our development team responds in < 4h on weekdays.

ACTIO - SMS API gateway, VoIP and virtual numbers for companies and developers.