The Voice AI Platform for Business
Voice Nexus is an enhancement to the Voice Elements Cloud Platform that connects your phone numbers and WebRTC endpoints to OpenAI Realtime voice models. Build a managed agent in VnsPortal, or control every call from your own webhooks — with tool integration and call management either way.
Managed AI Voice Agents
Create an agent in VnsPortal from a QuickStart template or from scratch, then configure, revise, publish, and assign it to a phone number. VNS serves the published configuration, so standard agents need no custom webhook service.
- ✓ QuickStart templates you can customize
- ✓ Drafts, revisions, and publishing
- ✓ Phone-number assignment and outbound test calls
Inbound AI Voice Handling
Connect DIDs and WebRTC sessions to realtime AI agents. Each call runs either your published VnsPortal agent or the configuration your CallStart webhook returns — giving developers per-call control over instructions, model selection, time limits, and billing context.
- ✓ 24/7 AI answering with natural conversation
- ✓ Managed agents or per-call webhook instructions
- ✓ Supports gpt-realtime-2.1 and gpt-realtime-2.1-mini
Function & MCP Integration
During a live call, the AI can invoke tools connected to your scheduling system, CRM, databases, or any API. VNS brokers the request with full session context and feeds the result back into the conversation. If a tool is slow, optional comfort audio keeps the caller company while it runs.
- ✓ Mid-conversation API calls
- ✓ MCP server support
- ✓ Comfort audio during slow HTTP or MCP tool calls
Transfers With Truthful Outcomes
Blind or attended transfers to named services, dialed sequentially or simultaneously. During an attended transfer the caller can hear your own hold media, and if the destination declines, doesn't answer, or times out, the caller is restored to the AI. CallEnd reports whether the caller was actually handed off — not just whether the destination answered.
- ✓ Attended-transfer caller hold media
- ✓ Automatic caller restoration to the AI
- ✓ Handoff and restore evidence in CallEnd
Media Library & Call Flow
Play recorded announcements before, after, or instead of the AI conversation — a recording-consent notice, an outbound introduction, a holiday closure message, or a farewell when the caller goes quiet.
- ✓ Account-scoped Media Library
- ✓ Announcements, idle farewells, and announcement-only flows
- ✓ Media evidence reported in CallEnd
Built-in Call Control & SMS
Voice Nexus ships with built-in tools that require no server endpoint — end conversations gracefully, transfer calls, retrieve call metadata, get the current time, and send an SMS from one of your authorized numbers.
- ✓ vns_end_conversation & vns_transfer_call
- ✓ vns_get_call_info & vns_get_utc_datetime
- ✓ vns_send_sms
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