SIP • WEBRTC • AI • VOICE • AGENT • DEVELOPMENT
Build modern SIP and VoIP applications
Build, deploy, distribute and monetize secure VoIP communication products with VaxVoIP SDKs.
Create SIP servers, branded softphones, WebRTC webphones, SIPREC recording solutions and AI voice agents.
✓ 30-day trial
✓ Sample source code
✓ Technical support
PRODUCTS
One SDK platform for complete VoIP development
Choose the product that matches your application, infrastructure and deployment requirements.
Agent AI SDK
Connect SIP servers and IP-PBX systems directly with real-time AI models for multilingual voice automation.
- SIP-to-AI gateway
- Real-time voice interaction
- Function calling and automation
SIP Server SDK
Develop secure SIP servers, IP-PBX systems, IVR, call centers, auto dialers, registrar and proxy services.
- Multi-core performance
- Threat detection
- NAT and firewall friendly
SIP Phone SDK
Build your own branded SIP softphone with a custom interface and full control over calling features.
- Windows, Android and iOS
- Voice, video and messaging
- Multiple accounts and lines
WebPhone SDK
Connect website visitors to a SIP server or IP-PBX with real-time WebRTC audio, video, chat and screen sharing.
- No browser plugin
- Major browser support
- Works with SIP-compliant servers
SIP Recording SDK
Create SIPREC-compliant servers that capture VoIP call audio for secure archiving, analysis and compliance.
- Unlimited recording sessions
- Multi-tenant encryption
- Real-time PCM access
WHY • VAXVOIP
Built for developers. Ready for business.
Accelerated development
Start with working demos, technical manuals and easy-to-understand sample source code.
Flexible integration
Use exported APIs and events to build a custom interface, workflow and branded solution.
Standards focused
Develop SIP and WebRTC communication products designed to work with compatible infrastructure.
Security controls
Build encrypted communication and detect SIP scanning, flooding and brute-force attacks.
Scalable architecture
Use multi-core and multi-processor systems to handle demanding communication workloads.
Commercial support
Annual licensing includes technical assistance, maintenance, updates and new releases.
SOLUTIONS
Build communication services for every scenario
Use VaxVoIP SDKs as the foundation for your own product, hosted service or customer deployment.
IP-PBX & UC
Extensions, routing, transfer, forwarding, voicemail, presence and conferencing.
IVR & Auto Dialer
Automated prompts, DTMF collection, campaigns and call-flow automation.
Contact Centers
Queues, ring groups, parking, pickup, barging, monitoring and coaching.
AI Voice Agents
Connect telephony calls to multilingual real-time conversational AI.
Call Recording
Capture, encrypt, archive and analyze SIP call recordings.
Web Communications
Embed audio, video, messaging and screen sharing directly in websites.
DEVELOPERS
Go from sample code to a working VoIP product
Download a complete SDK package with demo applications, technical documentation and sample projects for supported development environments.
- Simple API and event-driven integration
- Sample projects for multiple languages
- Technical manuals and flow diagrams
- 30-day evaluation period
C#C++VB.NETJavaScript
// Initialize the SIP Server SDK
const int nListenPort = 5060;
VaxServerSIP objSIP = new VaxServerSIP();
objSIP.SetLicenseKey("TRIAL-LICENSE-KEY");
objSIP.Initialize("");
// Open SIP network transports
objSIP.OpenNetworkUDP("", nListenPort);
objSIP.OpenNetworkTCP("", nListenPort);
objSIP.OpenNetworkTLS("", nListenPort + 1, "");
// Add a SIP user
objSIP.AddUser("9090", "Bx45");
// Handle SDK events
void OnIncomingCall(int nSessionId, ...)
void OnRegisterUser(string sUserName, ...)YOUR • BUSINESS • YOUR • BRAND
Develop, deploy, distribute and monetize
Develop
Build your VoIP product using VaxVoIP APIs, demos and samples.
Deploy
Run on-premises, in your data center or within your chosen cloud environment.
Distribute
Deliver a customized application under your own company and product identity.
Monetize
Offer software, hosted services or communication features to your customers.
AGENT • AI • SDK
Connect your SIP server to real-time AI
Use VaxVoIP Agent AI SDK as a SIP-to-AI gateway between an existing SIP server or IP-PBX and real-time speech models. Build multilingual voice agents without managing low-level AI audio protocols yourself.
Explore Agent AI SDKRESOURCES
Everything you need to evaluate and build
Documentation
Technical manuals, feature guides and implementation workflows.
Sample Code
Working projects designed to make SDK integration easier.
Demo Applications
Test product capabilities during the 30-day evaluation period.
VoIP Learning Center
Practical guides covering SIP, WebRTC, IP-PBX, security and AI.
START • BUILDING • TODAY
Ready to create your next VoIP product?
Talk with the VaxVoIP team, evaluate the SDKs and choose the right foundation for your communication solution.