> ## Documentation Index > Fetch the complete documentation index at: https://docs.trugen.ai/llms.txt > Use this file to discover all available pages before exploring further. # Basic JavaScript Example > Get your first AI avatar running using a JavaScript Node server. The TruGen API provides a simple interface for implementing digital AI avatars within your web applications. This guide will walk you through the process of setting up a minimal example of an interactive AI avatar using a JavaScript server. ## Prerequisites * A TruGen API key (get one [here](https://app.trugen.ai/api-keys)) * A TruGen Agent ID (create and get one [here](https://app.trugen.ai/teammate-library)) * Node.js installed on your machine * A modern web browser with microphone access ## Project Setup ```bash theme={null} npm init -y npm install express dotenv @trugen/js-sdk ``` Create the following directory layout: ```text theme={null} project/ ├── .env ├── server.js ├── public/ │ └── index.html └── package.json ``` Create a `.env` file and add your API key and Agent ID: ```env theme={null} TRUGEN_API_KEY=your-api-key-here AGENT_ID=your-agent-id-here ``` Never expose your API key in the browser. The server reads it from `.env` and returns only a short-lived session token to the client. Create `server.js` — this keeps your API key on the server and returns a session token to the browser: ```javascript theme={null} const express = require("express"); require("dotenv").config(); const app = express(); app.use(express.json()); app.use(express.static("public")); app.post("/api/session-token", async (req, res) => { try { const response = await fetch("https://api.trugen.ai/v1/auth/conversation", { method: "POST", headers: { "Content-Type": "application/json", "X-API-Key": process.env.TRUGEN_API_KEY, }, body: JSON.stringify({ agentId: process.env.AGENT_ID, }), }); if (!response.ok) { const errorData = await response.json(); console.error("Token creation failed:", errorData); return res.status(response.status).json({ error: "Token creation failed" }); } const { token } = await response.json(); res.json({ token }); } catch (error) { console.error("Network error:", error); res.status(500).json({ error: "Failed to create session token" }); } }); app.listen(3000, () => console.log("Server running at http://localhost:3000")); ``` Create `public/index.html`: ```html theme={null} Hello TruGen

Chat with your AI Avatar

Your avatar will appear below once connected

Ready

``` ```bash theme={null} node server.js ``` Navigate to `http://localhost:3000` in your browser, allow microphone access when prompted, then click **Connect**.