AI Voice Agent with React Native

Zero Runtime lets you integrate an AI voice agent into your React Native app (Android/iOS) within minutes. The agent joins the same meeting room and interacts over voice using the Google Gemini Live API.

Prerequisites

Before proceeding, ensure that your development environment meets the following requirements:

A Zero Runtime account (create one from the Zero Runtime Dashboard).
Node.js and a working React Native environment (Android Studio and/or Xcode).
Python 3.11+ installed on your device.

You need a Zero Runtime account to generate a token. The agent reaches the Gemini Live API through the Zero Runtime Inference Gateway, so you don’t need a separate Google API key. Generate a token from the Zero Runtime Dashboard.

Project Structure

First, create an empty project using mkdir folder_name in your preferred location for the React Native frontend. Your final project structure should look like this:

root

android

ios

App.js

constants.js

index.js

agent-react-native.py

.env

You will be working on the following files:

android/: Contains the Android-specific project files.
ios/: Contains the iOS-specific project files.
App.js: The main React Native component, containing the UI and meeting logic.
constants.js: Stores the token and meeting ID for the frontend.
index.js: The entry point of the React Native application, where the SDK is registered.
agent-react-native.py: The Python AI agent backend using the Google Gemini Live API.
.env: Environment variables for the Python agent’s API keys.

1. React Native Frontend

Step 1: Create the app and install the SDK

Create a React Native app and install the React Native SDK:

npx react-native init videosdkAiAgentRN
cd videosdkAiAgentRN

# Install the SDK
npm install "@videosdk.live/react-native-sdk"

Step 2: Configure the Android project

Add the required permissions in the AndroidManifest.xml file.

android/app/src/main/AndroidManifest.xml

<manifest
  xmlns:android="http://schemas.android.com/apk/res/android"
>
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission
        android:name="android.permission.BLUETOOTH"
        android:maxSdkVersion="30" />
    <uses-permission
        android:name="android.permission.BLUETOOTH_ADMIN"
        android:maxSdkVersion="30" />

    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />

    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
</manifest>

Link the necessary native dependencies:

android/app/build.gradle

dependencies {
 implementation project(':rnwebrtc')
}

android/settings.gradle

include ':rnwebrtc'
project(':rnwebrtc').projectDir = new File(rootProject.projectDir, '../node_modules/@videosdk.live/react-native-webrtc/android')

MainApplication.kt

import live.videosdk.rnwebrtc.WebRTCModulePackage

class MainApplication : Application(), ReactApplication {
  override val reactNativeHost: ReactNativeHost =
      object : DefaultReactNativeHost(this) {
        override fun getPackages(): List<ReactPackage> {
          val packages = PackageList(this).packages.toMutableList()
          packages.add(WebRTCModulePackage())
          return packages
        }
        // ...
      }
}

android/gradle.properties

/* This one fixes a weird WebRTC runtime problem on some devices. */
android.enableDexingArtifactTransform.desugaring=false

Include the following line in your proguard-rules.pro file (optional, only if you are using Proguard):

android/app/proguard-rules.pro

-keep class org.webrtc.** { *; }

In your build.gradle file, update the minimum OS/SDK version to 23:

android/build.gradle

buildscript {
  ext {
      minSdkVersion = 23
  }
}

Step 3: Configure the iOS project

Ensure that you are using CocoaPods version 1.10 or later. To update CocoaPods, reinstall the gem using sudo gem install cocoapods.

Change the path of react-native-webrtc in your Podfile:

ios/Podfile

pod 'react-native-webrtc', :path => '../node_modules/@videosdk.live/react-native-webrtc'

Update the platform field in the Podfile to iOS 12.0 or above, since react-native-webrtc doesn’t support earlier versions: platform :ios, '12.0'.Install the pods:

pod install

Declare the camera and microphone permissions in Info.plist (located at project folder/ios/projectname/info.plist):

ios/MyApp/Info.plist

<key>NSCameraUsageDescription</key>
<string>Camera permission description</string>
<key>NSMicrophoneUsageDescription</key>
<string>Microphone permission description</string>

Step 4: Register the service and configure credentials

index.js

import { AppRegistry } from "react-native";
import App from "./App";
import { name as appName } from "./app.json";
import { register } from "@videosdk.live/react-native-sdk";

register();

AppRegistry.registerComponent(appName, () => App);

Create a meeting room using the Zero Runtime API:

curl -X POST https://api.videosdk.live/v2/rooms \
  -H "Authorization: YOUR_JWT_TOKEN_HERE" \
  -H "Content-Type: application/json"

Copy the roomId from the response and create a constants.js file to store your token and meeting ID.

constants.js

export const token = "YOUR_ZERORUNTIME_AUTH_TOKEN";
export const meetingId = "YOUR_MEETING_ID";
export const name = "User Name";

Step 5: Build the UI and wire up MeetingProvider

App.js

import React from 'react';
import {
  SafeAreaView,
  TouchableOpacity,
  Text,
  View,
  FlatList,
} from 'react-native';
import {
  MeetingProvider,
  useMeeting,
} from '@videosdk.live/react-native-sdk';
import { meetingId, token, name } from './constants';

const Button = ({ onPress, buttonText, backgroundColor }) => {
  return (
    <TouchableOpacity
      onPress={onPress}
      style={{
        backgroundColor: backgroundColor,
        justifyContent: 'center',
        alignItems: 'center',
        padding: 12,
        borderRadius: 4,
      }}>
      <Text style={{ color: 'white', fontSize: 12 }}>{buttonText}</Text>
    </TouchableOpacity>
  );
};

function ControlsContainer({ join, leave, toggleMic }) {
  return (
    <View
      style={{
        padding: 24,
        flexDirection: 'row',
        justifyContent: 'space-between',
      }}>
      <Button
        onPress={() => {
          join();
        }}
        buttonText={'Join'}
        backgroundColor={'#1178F8'}
      />
      <Button
        onPress={() => {
          toggleMic();
        }}
        buttonText={'Toggle Mic'}
        backgroundColor={'#1178F8'}
      />
      <Button
        onPress={() => {
          leave();
        }}
        buttonText={'Leave'}
        backgroundColor={'#FF0000'}
      />
    </View>
  );
}

function ParticipantView({ participantDisplayName }) {
  return (
    <View
      style={{
        backgroundColor: 'grey',
        height: 300,
        justifyContent: 'center',
        alignItems: 'center',
        marginVertical: 8,
        marginHorizontal: 8,
      }}>
      <Text style={{ fontSize: 16 }}>Participant: {participantDisplayName}</Text>
    </View>
  );
}

function ParticipantList({ participants }) {
  return participants.length > 0 ? (
    <FlatList
      data={participants}
      renderItem={({ item }) => {
        return <ParticipantView participantDisplayName={item.displayName} />;
      }}
    />
  ) : (
    <View
      style={{
        flex: 1,
        backgroundColor: '#F6F6FF',
        justifyContent: 'center',
        alignItems: 'center',
      }}>
      <Text style={{ fontSize: 20 }}>Press Join button to enter meeting.</Text>
    </View>
  );
}

function MeetingView() {
  const { join, leave, toggleMic, participants, meetingId } = useMeeting({});

  const participantsList = [...participants.values()].map(participant => ({
    displayName: participant.displayName,
  }));

  return (
    <View style={{ flex: 1 }}>
      {meetingId ? (
        <Text style={{ fontSize: 18, padding: 12 }}>Meeting Id : {meetingId}</Text>
      ) : null}
      <ParticipantList participants={participantsList} />
      <ControlsContainer
        join={join}
        leave={leave}
        toggleMic={toggleMic}
      />
    </View>
  );
}

export default function App() {
  if (!meetingId || !token) {
    return (
      <SafeAreaView style={{ flex: 1, backgroundColor: '#F6F6FF' }}>
        <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
          <Text style={{ fontSize: 20, textAlign: 'center' }}>
            Please add a valid Meeting ID and Token in the `constants.js` file.
          </Text>
        </View>
      </SafeAreaView>
    );
  }

  return (
    <SafeAreaView style={{ flex: 1, backgroundColor: '#F6F6FF' }}>
      <MeetingProvider
        config={{
          meetingId,
          micEnabled: true,
          webcamEnabled: false,
          name,
        }}
        token={token}>
        <MeetingView />
      </MeetingProvider>
    </SafeAreaView>
  );
}

2. Python AI Agent

Step 1: Setup the project

Use Python 3.11 or higher, then install the Zero Runtime Agents SDK. Create and activate a virtual environment, then install zrt and python-dotenv. Every provider plugin ships with zrt.

uv venv --python 3.11
source .venv/bin/activate     # macOS/Linux
.\.venv\Scripts\activate      # Windows

python3.11 -m venv venv
source venv/bin/activate      # macOS/Linux
.\venv\Scripts\activate       # Windows

New to uv? See the uv install guide.

uv pip install zeroruntime python-dotenv

pip install zeroruntime python-dotenv

Step 2: Configure environment variables

Create a .env file in your project root to store your token securely for the Python agent:

.env

# pre-generated Zero Runtime auth token
ZERORUNTIME_AUTH_TOKEN=your_zrt_auth_token_here

Step 3: Create the AI agent backend

Create the Python AI agent (agent-react-native.py) that joins the same meeting room and interacts with users through voice.

agent-react-native.py

import zeroruntime
from zeroruntime import Agent, Pipeline, Room
from zeroruntime.inference import AICousticsDenoise, GeminiRealtime
from dotenv import load_dotenv

load_dotenv()

pipeline = Pipeline(
    llm=GeminiRealtime(
        model="gemini-3.1-flash-live-preview", config={"voice": "Leda", "response_modalities": ["AUDIO"]},
    ),
    denoise=AICousticsDenoise(model_id="quail-vf-2.2-l-16khz"),
)


class MyVoiceAgent(Agent):
    def __init__(self) -> None:
        super().__init__(
            name="MyVoiceAgent",
            instructions="You are a high-energy game-show host guiding the caller to guess a secret number from 1 to 100 to win 1,000,000$.",
            pipeline=pipeline,
        )

    async def on_enter(self) -> None:
        await self.session.say(
            "Welcome to the Zero Runtime AI Agent game show! I'm your host, and we're about to play for 1,000,000$. Are you ready to play?"
        )

    async def on_exit(self) -> None:
        await self.session.say("Goodbye!")


def invoke_agent() -> None:
    # Join the same room the frontend created (its meeting ID).
    zeroruntime.invoke(room=Room(room_id="YOUR_MEETING_ID"))


if __name__ == "__main__":
    zeroruntime.serve(MyVoiceAgent, on_ready=invoke_agent)

3. Run the Application

Step 1: Start the React Native app

npm install

# Android
npm run android

# iOS (macOS only)
cd ios && pod install && cd ..
npm run ios

Step 2: Run the AI agent

Open a new terminal, activate your virtual environment, and run the Python agent. It reads ZERORUNTIME_AUTH_TOKEN from the .env file.

uv run python agent-react-native.py

python agent-react-native.py

Step 3: Connect and interact

Join the meeting from the app:
- Tap the Join button in the app.
- Allow microphone permissions when prompted.
Agent connection:
- Once you join, the Python agent detects your participation.
- You should see “Participant joined” in the terminal.
- The AI agent greets you and initiates the game.
Start playing:
- The agent guides you through a number guessing game (1–100).
- Use your microphone to interact with the AI host.

Troubleshooting

'Waiting for participant...' but no connection

Ensure both the React Native app and the agent are running.
Check that the meeting ID matches in constants.js and agent-react-native.py.
Verify your Zero Runtime token is valid.

Audio not working

Check device/simulator permissions for microphone access.

Agent not responding

Verify your ZERORUNTIME_AUTH_TOKEN is set in the .env file and is valid.

Next Steps

Quickstart Example

Complete working example with source code.

Build Your First Voice Agent

Learn the Cascade and Realtime pipelines in depth.

Overview

Build

Plugins

Deploy

AI Voice Agent with React Native

Prerequisites

Project Structure

1. React Native Frontend

2. Python AI Agent

3. Run the Application

Troubleshooting

Next Steps

Quickstart Example

Build Your First Voice Agent

​Prerequisites

​Project Structure

​1. React Native Frontend

​2. Python AI Agent

​3. Run the Application

​Troubleshooting

​Next Steps

Quickstart Example

Build Your First Voice Agent

Prerequisites

Project Structure

1. React Native Frontend

2. Python AI Agent

3. Run the Application

Troubleshooting

Next Steps