> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nextevi.com/llms.txt
> Use this file to discover all available pages before exploring further.

# NextEVI: Voice AI Platform

> Build intelligent voice applications with NextEVI's powerful real-time voice AI platform

# NextEVI: Voice AI for Developers

**Build voice AI applications in minutes, not months.** NextEVI provides everything you need to add intelligent voice conversations to your applications with just a few lines of code.

```tsx theme={null}
import { useVoice } from '@nextevi/voice-react';

function VoiceChat() {
  const { connect, messages, isRecording } = useVoice();
  
  return (
    <div>
      <button onClick={() => connect({ 
        auth: { apiKey: "oak_key", configId: "config" } 
      })}>
        Start Voice Chat
      </button>
      {messages.map(msg => <div key={msg.id}>{msg.content}</div>)}
    </div>
  );
}
```

## Why Choose NextEVI?

<CardGroup cols={2}>
  <Card title="5-Minute Integration" icon="clock">
    React SDK and WebSocket API - get voice AI running instantly
  </Card>

  <Card title="Emotion Intelligence" icon="heart">
    Real-time emotion detection for empathetic AI responses
  </Card>

  <Card title="Production Ready" icon="shield">
    Scalable infrastructure handling thousands of concurrent conversations
  </Card>

  <Card title="Developer First" icon="code">
    Clean APIs, TypeScript support, comprehensive documentation
  </Card>
</CardGroup>

## Speech-to-Speech Voice AI

NextEVI's Speech-to-Speech (EVI) enables natural, full-duplex voice conversations with advanced emotion recognition, turn detection, and seamless interruption handling.

**Key Features:**

* **Real-time Processing**: Sub-200ms latency for natural conversations
* **Emotion Detection**: 9 emotions with confidence scoring
* **Turn Detection**: Intelligent conversation flow with interruption handling
* **Multi-platform**: React SDK and WebSocket API for any stack
* **TypeScript**: Full type safety and IntelliSense support

## What You Can Build

<CardGroup cols={3}>
  <Card title="Customer Support" icon="headset">
    Emotion-aware support bots with escalation detection
  </Card>

  <Card title="Voice Tutors" icon="graduation-cap">
    Adaptive learning with engagement tracking
  </Card>

  <Card title="Healthcare Assistants" icon="heart-pulse">
    Empathetic health monitoring and wellness tracking
  </Card>

  <Card title="Gaming Characters" icon="gamepad">
    Immersive NPCs with dynamic emotional responses
  </Card>

  <Card title="Accessibility Tools" icon="universal-access">
    Voice-first interfaces for inclusive experiences
  </Card>

  <Card title="Smart Assistants" icon="robot">
    Custom voice AI for any domain or use case
  </Card>
</CardGroup>

## Get Started in 5 Minutes

<Steps>
  <Step title="Get API Key">
    Sign up at [NextEVI Dashboard](https://dashboard.nextevi.com) and copy your API credentials
  </Step>

  <Step title="Install SDK">
    ```bash theme={null}
    npm install @nextevi/voice-react
    ```
  </Step>

  <Step title="Add Voice Chat">
    ```tsx theme={null}
    const { connect, messages } = useVoice();
    await connect({ auth: { apiKey: "oak_key", configId: "config" } });
    ```
  </Step>
</Steps>

## Choose Your Integration Path

<CardGroup cols={2}>
  <Card title="5-Minute Quickstart" icon="rocket" href="/quickstart">
    Complete voice chat app with working code
  </Card>

  <Card title="Speech-to-Speech Guide" icon="microphone" href="/speech-to-speech/overview">
    Deep dive into voice AI capabilities
  </Card>

  <Card title="React SDK" icon="react" href="/speech-to-speech/react-sdk/installation">
    Comprehensive React integration guide
  </Card>

  <Card title="WebSocket API" icon="code" href="/speech-to-speech/websocket-api/connection">
    Direct WebSocket integration for any platform
  </Card>
</CardGroup>

***

**Ready to build voice AI?** [Start with our 5-minute quickstart →](/quickstart)