How to Build a n8n Chat Bot for Free – Website & ChatGPT Integration

Why Build a Chatbot with n8n?

If you’re exploring modern workflow automation, you’ve likely come across n8n. It’s one of the most flexible, open-source automation tools that allows businesses to build smart chat bots without heavy dependencies. But how do you actually build a n8n chatbot especially one that integrates with ChatGPT, works with Python and can be embedded on your website?

This guide breaks down the full process for those wondering:

• How to build a n8n chat bot for free?

• How to build a n8n chat bot with ChatGPT or Python?

• How to build a n8n chat bot for my website?

Let’s walk through it step by step.

What is n8n?

n8n (short for “nodemation”) is an open-source workflow automation platform. It enables users to create automated tasks through a visual interface, connecting APIs, databases, messaging platforms and more.

For chatbot creation, n8n’s biggest advantage is flexibility: you can link it to OpenAI, Telegram, Discord, WhatsApp and even your own frontend.

Step 1: Setting Up Your n8n Environment

Before building the chatbot, you need to install and configure n8n on your local machine or a cloud server.

Option A: Use n8n for Free (Local or Self-Hosted)

• Install Node.js (v18+)

• Run npm install n8n -g

• Start with n8n start

Alternatively, you can spin up a free Docker container or deploy it on services like Vercel or Render. This is ideal for those asking how to build a n8n chat bot for free.

Option B: Use n8n Cloud (Paid, with Trial)

If you’re less technical, try n8n cloud for faster setup and a user-friendly UI great for testing before going live.

Step 2: Create Your Basic Chatbot Workflow in n8n

1. Start with a Trigger Node
   Use Webhook if your chatbot is on your website or Telegram Trigger, Discord Trigger, etc., depending on your platform.

2. Add a Function Node (for Message Handling)
   This processes the user’s input. You can extract the message, user ID or other metadata.

   Example in JavaScript:

   javascript

   CopyEdit

   return [{
json: {
prompt: $json.body.message,
}
}];


3. Connect to OpenAI’s GPT API
   Add the HTTP Request node:

   • URL: https://api.openai.com/v1/chat/completions

   • Method: POST

   • Auth: Bearer token from your OpenAI account

   Send a request using:

   json

   CopyEdit

   {
"model": "gpt-4",
"messages": [
{"role": "user", "content": {{$json["prompt"]}}}
]
}


4. Return the Response
   Use another Webhook Response or message send node (Telegram, Discord, etc.).

This is the foundation for anyone asking how to build a n8n chat bot with ChatGPT.

Step 3: Enhance with Python Logic (Optional)

For those who prefer more control or want to handle NLP tasks locally, Python integration is possible using the Execute Command Node or a custom API.

1. Use n8n’s HTTP Request Node to Send Input to a Python Script

   • Host a Flask or FastAPI app with a chatbot route

   • Process the user message using your logic or a local LLM

   • Return the response to n8n for user delivery

2. Or Use the Execute Command Node

   • Example command:

     bash

     CopyEdit

     python3 my_bot.py --prompt "{{$json["prompt"]}}"


This flexibility is valuable if you’re wondering how to build a n8n chat bot with Python.

Step 4: Embedding the Chat Bot on Your Website

If your goal is how to build a n8n chat bot for my website, here’s what to do:

1. Frontend Interface
   Use a lightweight HTML + JS chat widget like:

   • BotUI

   • Vanilla Chatbox with AJAX requests

2. n8n Webhook URL
   Point the widget’s POST method to the webhook URL of your n8n workflow (e.g., https://yourdomain.com/webhook/chatbot).

3. Handle CORS and SSL
   Set proper headers in n8n’s webhook node and enable HTTPS for live deployment.

Now your chatbot can interact directly with website visitors, powered by n8n and OpenAI or Python.

Tips to Optimize and Scale Your Chatbot

• Rate Limits: Monitor API usage to avoid OpenAI rate blocks.

• Data Logging: Store chats in Google Sheets, MySQL or HubSpot for analysis.

• Intent Detection: Use prompt engineering or connect to NLP APIs to improve chatbot understanding.

• Multi-platform Integration: One workflow can support both your website and apps like Telegram.

Security Best Practices

• Never expose raw API keys in workflows.

• Use environment variables or credentials node in n8n.

• Enable authentication on webhook endpoints if not public-facing.

Use Cases for n8n Chatbots

• Customer Support: Automate first-level queries on your site.

• Lead Generation: Collect and send visitor data to HubSpot integrates or CRMs.

• Internal Tools: Create Slack bots to fetch documents or trigger reports.

• E-Commerce: Answer product FAQs, track orders or upsell.

Conclusion

Knowing how to build a n8n chat bot gives your business powerful automation without heavy investment in traditional chatbot platforms. Whether you’re building one for free, integrating ChatGPT, using Python or deploying it on your website, n8n makes the process modular, transparent and efficient.

If you’re ready to supercharge your marketing, customer experience or internal operations, building your first n8n ai chatbot is a smart place to start.

FAQs

1. Can I build a n8n ai chatbot without coding?
Yes. n8n offers a visual workflow builder. However, minimal code helps enhance logic and customization.

2. How much does it cost to run a n8n robot chatbot?
Using the self-hosted version is free. You’ll only pay for services like OpenAI or hosting.

3. Can I deploy the chatbot on WordPress?
Yes. Use a simple plugin or custom widget to connect your chatbot UI with n8n’s webhook.

4. How do I handle errors in the chatbot?
Use Error Trigger nodes or conditional checks to reroute or retry failed workflows.

5. Is it secure to use OpenAI with n8n?
Yes, as long as you store your API keys securely and restrict webhook access.

Relevant Guides & Services

How to Add HubSpot Extension to Outlook in 4 Easy Steps

How to Add a Company to a List in HubSpot – 2026 Guide

How to Preview from HubSpot CLI – Beginners Guide

How to Move from HubSpot to Salesforce: A Step-by-Step Migration Guide

Can GoHighLevel Replace HubSpot – GoHighLevel vs HubSpot Guide

Is a HubSpot Module a Widget? Lets Discover Here