Add AI voice agents to your Nextiva phone line using Cartesia. Self-host SIP4AI, configure your credentials, and let AI handle calls in minutes.
Business VoIP provider with SIP trunking and UCaaS solutions.
Ultra-low latency voice AI optimized for real-time conversational applications.
Download and install SIP4AI on your server or local machine.
# Install SIP4AI
curl -sSL https://sip4ai.com/install.sh | bashConfigure SIP trunk in Nextiva admin portal.
# Set Nextiva credentials
export SIP_SERVER=nextiva.sip-provider.com
export SIP_USERNAME=your_username
export SIP_PASSWORD=your_passwordRequires Cartesia API key. Best-in-class latency for voice apps.
# Set Cartesia API key
export CARTESIA_API_KEY=your_api_keyRun SIP4AI with your Nextiva and Cartesia configuration.
# Start SIP4AI with cartesia provider
sip4ai --provider cartesia
# SIP4AI will register with Nextiva and wait for calls
INFO Registering with SIP server...
INFO Connected to Cartesia API
INFO Ready to handle callsGet started with SIP4AI today. Free for non-commercial use, affordable plans for businesses.