Building Your First AI Chatbot with OpenAI

Introduction#

Creating an AI agent has never been easier with OpenAI's powerful API. In this tutorial, we'll build a complete agent from scratch.

Prerequisites#

• Node.js installed
• OpenAI API key
• Basic JavaScript knowledge

Step 1: Setup OpenAI API#

First, get your API key from OpenAI:

npm install openai

import OpenAI from 'openai';

const openai = new OpenAI({
  apiKey: process.env.OPENAI_API_KEY,
});

Step 2: Create Chat Function#

async function chatWithAI(message) {
  const completion = await openai.chat.completions.create({
    messages: [{ role: "user", content: message }],
    model: "gpt-3.5-turbo",
  });

  return completion.choices[0].message.content;
}

Step 3: Build the Interface#

Create a simple HTML interface:

  

  
  Send

Production Deployment Notes (South Asia & Nepal)#

When deploying OpenAI-based bots for businesses in Kathmandu or regional South Asia:

• Cost Management in NPR: API calls billed in USD translate to approximately NPR 0.15 - 0.40 per turn on GPT-4o-mini. Set strict monthly usage budgets to avoid unexpected currency exchange charges.
• Payment Verification: For e-commerce chatbots, bridge checkout intents directly with eSewa or Fonepay QR payment webhooks rather than relying solely on international cards.
• Network Optimization: Ensure fallback mechanisms for fluctuating 4G mobile connections across NTC and Ncell networks.

Conclusion#

You now have a working AI chatbot! This is just the beginning - you can add features like conversation memory, file uploads, and more advanced AI capabilities.