Turn Any Phone Number Into an AI Voice Agent
The Voice Nexus Service (VNS) connects your phone numbers to OpenAI Realtime voice models. Automate inbound and outbound calls with natural-sounding AI agents that integrate with your CRM, scheduler, and business systems.
Everything You Need for AI Voice Automation
Voice Nexus handles the hard parts so you can focus on your business logic.
Inbound AI Agents
Connect any DID or WebRTC endpoint to an AI voice agent that answers calls 24/7 with natural conversation.
Outbound Campaigns
Initiate outbound AI calls via API for appointment reminders, follow-ups, and proactive outreach.
Tool & MCP Integration
Let the AI call your APIs mid-conversation — schedule appointments, look up records, or transfer to humans.
Webhook-Driven Setup
Your CallStart webhook controls instructions, billing context, and AI behavior per call — no redeployment needed.
Call Transfer & Escalation
Built-in tools for blind and attended transfers. Seamlessly hand off to live agents when needed.
Enterprise-Grade Platform
Built on Voice Elements, a carrier-grade telephony platform trusted by businesses across North America.
How Voice Nexus Works
Three steps to deploy your first AI phone agent.
Connect Your Number
Point a DID or WebRTC endpoint to Voice Nexus through the customer portal.
Define Your Webhooks
Your CallStart webhook returns per-call instructions, AI model config, and tool endpoints.
Go Live
Calls are answered by AI instantly — with real-time access to your CRM, scheduling, and business logic.
Built for Developers
Simple webhook contracts. Rich tool integration. Ship your first AI agent in minutes.
{
"VoiceElements_Instructions": {
"openAIUrl": "wss://api.openai.com/v1/realtime?model=gpt-realtime",
"openAIToken": "sk-YOUR_API_KEY",
"maxCallSeconds": 300,
"defaultToolsUrl": "https://your-api.com/tools",
"defaultToolsUrlAuthorizationHeader": "Bearer YOUR_TOKEN"
},
"instructions": "You are a helpful scheduling assistant for Acme Corp...",
"tools": [
{ "name": "vns_end_conversation", "type": "function", ... },
{ "name": "vns_transfer_call", "type": "function", ... }
]
}Trusted by Forward-Thinking Teams
See what companies are saying about Voice Nexus.
"VNS is a game changer for dental offices. It doesn’t just handle routine scheduling tasks — it can also make outbound calls to follow up with patients who haven’t completed their treatment plans."
"The webhook architecture is brilliant. We had a working AI receptionist in production in under a day."
"Voice Nexus unlocked the full power of ServiceTitan. With AI handling both outbound and inbound calling workflows, our service-based customers automate booking and follow-ups, eliminate hours of manual work, and never miss a call."
Ready to Automate Your Phone Lines?
See Voice Nexus in action. Book a live demo with our team and we'll walk you through setup, integrations, and pricing.