Voice Agents API
The most powerful API for building AI phone agents. Make calls, receive calls, transcribe conversations, and integrate with your existing stack. 10x easier than Vapi or Bland AI.
$10 free credits • No credit card required
Build Voice Agents in Minutes, Not Months
Simple, intuitive APIs that developers love. See how easy it is to get started.
// Create an AI voice agent with CallWhiz AI API
const response = await fetch('https://api.callwhiz.ai/v1/agents', {
method: 'POST',
headers: {
'Authorization': 'Bearer YOUR_API_KEY',
'Content-Type': 'application/json'
},
body: JSON.stringify({
name: 'Sales Assistant',
voice: 'nova',
language: 'en-IN',
prompt: 'You are a helpful sales assistant...',
model: 'gpt-4',
functions: ['schedule_meeting', 'send_email']
})
});
const agent = await response.json();
// Make an outbound call
const call = await fetch('https://api.callwhiz.ai/v1/calls', {
method: 'POST',
headers: {
'Authorization': 'Bearer YOUR_API_KEY',
'Content-Type': 'application/json'
},
body: JSON.stringify({
agent_id: agent.id,
to: '+919876543210',
from: '+918012345678',
webhook_url: 'https://your-app.com/webhooks/call-events'
})
});Everything You Need to Build Voice AI
Outbound & Inbound Calls
Make calls to any phone number or receive calls on dedicated DIDs. Support for SIP, PSTN, and WebRTC.
AI Voice Agents
Deploy intelligent agents that understand context, handle interruptions, and speak naturally in 30+ languages.
Real-time Webhooks
Get instant notifications for call events, transcriptions, and agent actions. Build reactive applications.
Simple REST APIs
Clean, well-documented APIs that work with any programming language. Get started in under 5 minutes.
Enterprise Security
SOC2 compliant, end-to-end encryption, and GDPR ready. Your data is always secure.
Global Coverage
Place calls to destinations in 180+ countries, with local numbers available in 20+. Low latency, high quality.
Why Developers Choose CallWhiz AI Over Vapi
| Feature | CallWhiz AI | Vapi | Bland AI |
|---|---|---|---|
| Setup Time | < 5 minutes | 30+ minutes | 45+ minutes |
| Indian Phone Numbers | ✅ Native Support | ❌ Limited | ❌ Limited |
| Pricing | ₹0.50/min | $0.05/min | $0.08/min |
| Language Support | 30+ languages | 20 languages | 15 languages |
| WebRTC Support | ✅ Built-in | ⚠️ Beta | ❌ No |
| On-premise Deploy | ✅ Available | ❌ No | ❌ No |
| Live Support | ✅ 24/7 | ⚠️ Business hours | ⚠️ Email only |
Build Any Voice Application
Customer Support Automation
Sales & Lead Qualification
Appointment Scheduling
Survey & Feedback Collection
Emergency Response Systems
Recruitment Screening
Start Building Voice AI Today
Join thousands of developers building the future of voice communication
Free tier includes 1000 minutes/month