You can create your own AI Agent in JavaScript (Node.js) using:
- OpenAI API
- Memory
- Tools/functions
- Chat interface
Create AI Agent
<script>
require("dotenv").config();
const express = require("express");
const cors = require("cors");
const OpenAI = require("openai");
const app = express();
app.use(cors());
app.use(express.json());
const client = new OpenAI({
apiKey: process.env.OPENAI_API_KEY,
});
// Simple Tool
function calculator(a, b) {
return a + b;
}
app.post("/chat", async (req, res) => {
const userMessage = req.body.message;
try {
// Tool Logic
if(userMessage.includes("add")) {
const result = calculator(10, 20);
return res.json({
reply: "Answer is " + result
});
}
// AI Response
const response = await client.chat.completions.create({
model: "gpt-4.1-mini",
messages: [
{
role: "system",
content: "You are a helpful AI agent."
},
{
role: "user",
content: userMessage
}
]
});
res.json({
reply: response.choices[0].message.content
});
} catch (error) {
console.log(error);
res.json({
reply: "Error occurred"
});
}
});
app.listen(3000, () => {
console.log("Server running on port 3000");
});
</script>
Please comment if want video on that.
