Turn Any Phone Number Into an AI Voice Agent
The Voice Nexus Service (VNS) answers and places calls with natural-sounding OpenAI voice agents that connect to your CRM, scheduler, and business systems. Build your agent in our portal with no code — starting from a ready-made template — or integrate it with our API.
Developer? Read the API docs
See Voice Nexus in Action
Watch how a phone number becomes a live AI voice agent in minutes.
Everything You Need for AI Voice Automation
Voice Nexus handles the hard parts so you can focus on your business.
Answers Every Call
Your AI agent answers your phone number — or a call button on your website — 24/7, with natural conversation.
Makes Calls for You
Have your agent place calls for appointment reminders, follow-ups, and outreach — started from your own systems.
Works With Your Systems
During a call, the agent can book appointments, look up customer records, or check your CRM — then pass the caller to a person when needed.
No Code Required
Build and publish agents in VnsPortal from ready-made templates. Developers can control every call from their own software instead.
Hands Off to a Person
Transfer callers to your staff any time — directly, or with the AI introducing the caller first.
Reliable Phone Network
Built on Voice Elements, a carrier-grade phone platform trusted by businesses across North America.
How Voice Nexus Works
Three steps to your first AI phone agent — all self-service.
Create Your Account
Sign up in VnsPortal and get a phone number. No sales call needed.
Build Your Agent
Start from a ready-made template and describe your business in plain English — or connect your own software through our API.
Go Live
Put the agent on your number and it starts answering calls right away — with access to your CRM, scheduling, and business systems.
Built for Developers
Need dynamic per-call control? Return your agent's configuration from a CallStart webhook. Simple contracts, rich tool integration.
{
"VoiceElements_Instructions": {
"aiUrl": {
"url": "wss://api.openai.com/v1/realtime?model=gpt-realtime-2.1",
"headers": {
"Authorization": "Bearer <<vns-api-token:MyOpenAiKey>>"
}
},
"maxSeconds": 300,
"defaultToolsUrlBase": {
"url": "https://your-api.example.com/tools",
"headers": {
"Authorization": "Bearer <<vns-api-token:MyToolsApi>>"
}
},
"defaultToolsUrlAdapter": null
},
"type": "session.update",
"session": {
"type": "realtime",
"model": "gpt-realtime-2.1",
"instructions": "You are a helpful scheduling assistant for Acme Corp."
}
}
<<vns-api-token:…>> placeholders keep your keys in the VNS Portal instead of your code.
How placeholders work →
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?
Create your account in VnsPortal and set up your first agent from a template today — or book a live demo and we'll walk you through it.
Questions first? Contact sales