Voice AI API
Voice AI API
Build and deploy advanced voice AI agents with our developer-friendly API. Sub-500ms latency, 99.99% uptime, and enterprise-grade reliability.
Simple, Powerful API
Get started in minutes with our intuitive API. Built for developers, optimized for production.
import { Vapi } from '@vapi-ai/web';
const vapi = new Vapi('your-public-key');
// Start a call
await vapi.start({
assistantId: 'your-assistant-id',
transcriber: {
provider: 'deepgram',
model: 'nova-2'
}
});
// Listen to events
vapi.on('call-start', () => {
console.log('Call has started');
});
vapi.on('message', (message) => {
console.log('Message:', message);
});Built for Any Voice Workflow
From inbound support to outbound campaigns—handle millions of voice interactions at scale.
Handle customer support, bookings, and inquiries automatically.
- Customer support
- Appointment booking
- FAQ automation
Automate sales outreach, reminders, and follow-ups at scale.
- Sales outreach
- Appointment reminders
- Survey calls
Everything You Need
Powerful features to build production-ready voice AI agents.
Multilingual
Support for 100+ languages with automatic detection and translation.
Customizable
Full control over voice, personality, conversation flow, and integrations.
Tool Calling
Connect to your APIs and databases for real-time data access during calls.
Analytics
Detailed insights into call performance, sentiment, and conversation metrics.
Automated Testing
Test your voice agents automatically before deploying to production.
A/B Testing
Experiment with different prompts and flows to optimize performance.
Enterprise-Grade Reliability
Built for mission-critical applications with security and compliance at the core.
99.99% Uptime
Custom real-time audio infrastructure with enterprise-grade reliability and redundancy.
Sub-500ms Latency
Ultra-low latency voice processing for natural, human-like conversations.
SOC2 & HIPAA Compliant
Enterprise-level security for healthcare and financial services applications.
AI Guardrails
Built-in conversation guardrails prevent hallucinations and ensure data integrity.
Integrate with Your Stack
Connect with 40+ popular services and platforms out of the box.
Developer-Friendly Pricing
Pay only for what you use. No hidden fees, no surprises.
Starter
Perfect for testing and small projects
- 1,000 free minutes
- Basic voice models
- Standard support
- API access
- Documentation
Professional
For growing businesses
- Everything in Starter
- Premium voice models
- Priority support
- Advanced analytics
- Custom integrations
- SLA guarantee
Enterprise
Custom solutions for large teams
- Everything in Pro
- Volume discounts
- Dedicated support
- Custom SLA
- On-premise options
- Training & onboarding