Connect existing telephony systems
SIP • TO • OPENAI • GATEWAY
SIP AI Voice Agent SDK for OpenAI Realtime
Connect SIP servers and IP-PBX systems to OpenAI Realtime and build multilingual AI voice agents for live telephone calls. VaxVoIP Agent AI SDK handles the SIP audio bridge so your application can focus on conversations, tools and automation.
✓ SIP server and IP-PBX integration
✓ OpenAI real-time speech-to-speech
✓ Natural multilingual voice interaction
✓ Commercial B2B deployment licensing
✓ 30-day fully functional trial
✓ Working sample projects included
Real-time speech-to-speech models
Natural voice-agent conversations
Commercial annual licensing
BUILD • AI • VOICE • AGENTS
Build real-time AI voice agents for SIP and IP-PBX systems
The SDK enables developers to create artificial-intelligence voice agents that process real-time SIP call audio and respond naturally in multiple languages. It directly connects a SIP server or IP-PBX with OpenAI real-time speech-to-speech models.
Instead of handling complex OpenAI protocols and low-level media integration yourself, your application can use VaxVoIP Agent AI SDK as the communication bridge.
Learn how to build a multilingual SIP voice agent →
Understand real-time speech-to-speech AI engines →
Start with the sample projects →
SIP Server
IP-PBX or Call centre
Agent AI SDK
SIP-to-OpenAI Gateway
OpenAI
Real-time AI Models
WHY • CHOOSE • VAXVOIP • AGENT • AI • SDK
Focus on your voice-agent application, not low-level integration
The SDK simplifies the connection between SIP telephony and OpenAI real-time voice models.
SIP server integration
Connect your existing SIP-based telephony environment to real-time AI services.
IP-PBX connectivity
Use an existing IP-PBX as the call platform for intelligent voice-agent interactions.
Real-time AI models
Connect calls directly with OpenAI real-time speech-to-speech models.
Gateway architecture
Use Agent AI SDK as the bridge between telephony and OpenAI.
Real-time SIP audio
Process live SIP-call audio for natural AI voice interaction.
Multilingual responses
Create agents capable of responding naturally in multiple languages.
Simplified integration
Avoid managing complex OpenAI APIs and low-level integration details yourself.
Sample source code
Begin with Visual C# .NET, Visual Basic .NET or Delphi examples.
HOW • IT • WORKS
A direct path from a SIP call to an AI response
SIP Call
A caller connects through your SIP server or IP-PBX.
Agent AI SDK
The SDK bridges the SIP telephony environment with OpenAI.
OpenAI Realtime
The real-time model processes the conversation and generates a response.
Voice Reply
The caller receives a natural, intelligent voice response.
AI • VOICE • SOLUTIONS
Build intelligent call experiences for your business
Use the SDK as the telephony foundation for commercial AI voice-agent solutions.
AI Receptionist
Use intelligent voice interaction for incoming SIP calls.
Customer Service Agent
Create real-time multilingual customer conversations.
Information Agent
Deliver automated spoken information over your PBX.
Outbound Voice Agent
Build commercial voice automation around SIP call flows.
Smart IVR
Add natural AI interaction to existing telephony services.
Multilingual Agent
Allow callers to communicate naturally in multiple languages.
DOCUMENTATION
Agent AI SDK technical documentation
Use these guides to configure the SDK and connect SIP call audio with OpenAI real-time models.
GETTING • STARTED
Download, read and watch
Download the sample code, unzip it and read the included ReadMe.txt. Then watch the demo video to understand the complete integration workflow.
1 Download sample code
2 Read ReadMe.txt
3 Watch the demo video
4 Test the full workflow
SAMPLE • CODES • INTEGRATED • WITH • OPENAI
Start with a working project in your preferred language
The Agent AI SDK includes working sample projects for Visual C# .NET, Visual Basic .NET and Delphi.
After downloading a project, read ReadMe.txt for setup instructions and watch the demo video to understand the complete integration workflow.
FREQUENTLY • ASKED • QUESTIONS
Understand the Agent AI SDK architecture
Find answers about the Agent AI SDK architecture, integration, supported languages and sample projects.
What does VaxVoIP Agent AI SDK do?
It works as a SIP-to-OpenAI gateway between a SIP server or IP-PBX and OpenAI real-time AI models.
Do I need to manage the OpenAI integration myself?
The SDK is designed to avoid the need to handle complex OpenAI APIs, AI protocols and low-level integration details directly.
Can it process live SIP call audio?
Yes. The SDK processes live SIP call audio, enabling real-time conversations between callers and AI voice agents.
Does it support multiple languages?
Yes. It supports multilingual AI voice agents that can respond naturally to callers in multiple languages.
Which sample-code languages are available?
Sample projects are available for Visual C# .NET, Visual Basic .NET and Delphi.
What is the recommended setup process?
Download and unzip the sample code, read ReadMe.txt, then watch the demo video to understand the complete workflow.
ANNUAL • COMMERCIAL • LICENSING
Choose the call capacity that fits your deployment
Annual licensing includes technical support, access to Agent AI SDK updates and new releases, ongoing maintenance, improvements and bug fixes.
10 concurrent calls
$1,480
One year · single serviceContact Sales20 concurrent calls
$2,620
One year · single serviceContact Sales40 concurrent calls
$4,420
One year · single serviceContact Sales80 concurrent calls
$6,420
One year · single serviceContact Sales160 concurrent calls
$8,860
One year · single serviceContact SalesUnlimited concurrent calls
$10,680
One year · single serviceContact SalesUnlimited services and unlimited concurrent calls
$16,860
One year · enterprise licenseContact SalesCONNECT • SIP • TO • REAL • TIME • AI
Ready to build your intelligent voice agent?
Download the sample project, review the workflow and discuss licensing or deployment requirements with the VaxVoIP team.