VaxVoIP SIP Voice Agent AI SDK is a Windows development toolkit for creating multilingual AI voice agents that communicate with callers over SIP telephone networks.

It connects SIP calls to OpenAI Realtime, helping developers build applications that support natural, two-way spoken conversations for customer service, automated reception, outbound calling, telephone surveys, and business information services.

Building AI telephone applications normally requires integrating call signaling, live audio, and communication with AI services. VaxVoIP simplifies the telephony-to-AI connection by bridging SIP call audio with OpenAI’s real-time speech-to-speech models. Developers can concentrate on conversation design, application behavior, and business workflows while using the SDK as the communication foundation.

How It Works

A compatible SIP phone or softphone registers with the SIP server configured in the application.…