Build Your Own Service
with Our API
Connect the ROLF OTP infrastructure and launch your own product powered by our voice call, spoofing, and SMS verification technologies.
Why Partners Choose Us
Built for Developers
CallerID Spoofing
Our API supports CallerID substitution — your users will receive a call from any number you specify. Perfect for legitimate verification services.
Global Coverage
Calls and SMS are delivered worldwide. All major carriers and regions supported without any additional configuration.
Instant Delivery
Average call delivery time is under 5 seconds. Our infrastructure ensures stable 24/7 operation with 99.9% uptime.
Security & Privacy
All requests are encrypted via TLS 1.3. Logs are retained for a minimum period and your users' data is fully protected.
Simple Integration
REST API with detailed documentation and examples in Python, Node.js, PHP and Go. Integration takes just a few hours.
Voice Scenarios
Create custom TTS call scenarios with support for English and other languages. Flexible text, voice and script configuration.
SMS Spoofing
Send SMS from any sender name. Unicode support, long messages, and real-time delivery status updates included.
Transparent Pricing
No hidden fees. Top up your balance and pay only for calls and messages actually made.
Entry Fee — $210
To gain access to the API partnership program, an initial deposit of $210 is required. This amount is credited in full to your account balance and is available to spend on calls and SMS.
- The $210 is transferred to your profile balance — funds never expire
- Full access to REST API with documentation and code examples
- Webhook support for receiving real-time status updates
- A dedicated account manager for technical support
- Branding options — your CallerID and SMS sender name
Pricing
API Usage Rates
Transparent rates — pay only for operations actually performed
Ready to Get Started?
Pay the $210 entry fee and get instant access to the full API with your balance credited immediately.