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

# Introduction

> RTVI JavaScript SDK Documentation

## Real-Time Voice and Video Inference (RTVI)

RTVI is an open standard for real-time AI inference.

The RTVI project's goal is to make it easy to build AI voice-to-voice and real-time video applications.

* Applications developers should be able to write code that can use any inference service.
* Inference services should be able to leverage open source for the complicated, client-side developer tooling needed for real-time multimedia.
* Any developer should be able to trivially stand up real-time AI infrastructure for small-scale use, testing, or prototyping.

***

## SDKs

### JavaScript SDK

<Card title="API Reference" icon="link" href="/api-reference">
  See the API Reference docs for RTVI Web
</Card>

You are reading the docs for the RTVI JavaScript SDK. This is an Open Source implementation of the RTVI standard intended for use in web browsers.

Because RTVI is a vendor-neutral standard, this SDK does not implement the lowest level of client-to-cloud communication. We call this the "transport" layer. To build RTVI client apps, you'll use both this SDK (`realtime-ai`) and a library that implements an RTVI transport.

For example:

```
npm install realtime-ai
npm install realtime-ai-react
npm install realtime-ai-daily
```

Once you have both this SDK and a transport library installed, a very simple *Hello World* app (using Daily as a transport) looks like this:

```javascript
import { DailyVoiceClient } from "realtime-ai-daily";

function myTrackHandler(track, participant) {
  if (participant.local || track.kind !== "audio") {
    return;
  }
  let audioElement = document.createElement("audio");
  audioElement.srcObject = new MediaStream([track]);
  document.body.appendChild(audioElement);
  audioElement.play();
}

const voiceClient = new DailyVoiceClient({
  baseUrl: process.env.NEXT_PUBLIC_BASE_URL || "/api",
  enableMic: true,
  callbacks: {
    onTrackStart: myTrackHandler,
  },
});

voiceClient.start();
```

Of course, a production-ready application is more lines of code than that! You may want to look at the [RTVI React SDK](https://github.com/pipecat-ai/rtvi-client-web/tree/main/rtvi-client-react), which wraps all the functionality from this SDK in React helpers and hooks.

There are also RTVI SDKs for Android and iOS. Links to those are in the nav sidebar.