💬 Create an intelligent Facebook Messenger chatbot with GPT-4o-mini & message memory

⚡ 1,384 views · 💬 Support Chatbots

Description

Who is this for?

Businesses and developers who want to automate customer support or engagement on Facebook Messenger using AI-powered responses.

What does it do?

Creates an intelligent Facebook Messenger chatbot that:

• Responds to messages using OpenAI (gpt-4o-mini)
• Batches rapid-fire messages into a single AI request
• Maintains conversation history (50 messages per user)
• Shows professional UX feedback (seen indicators, typing bubbles)

How it works

1. Webhook Verification - Handles Facebook’s GET verification request
2. Message Reception - Receives incoming messages via POST webhook
3. Message Batching - Waits 3 seconds to collect multiple quick messages
4. AI Processing - Sends combined message to OpenAI with conversation context
5. Response Delivery - Formats and sends the AI response back to Messenger

Setup

1. Configure Facebook Graph API credential with your Page Access Token
2. Configure OpenAI API credential with your API key
3. Set your verify token in the “Is Token Valid?” node
4. Register the webhook URL in Facebook Developer Console

Key Features

• Message Batching: Combines “Hey” + “Can you help” + “with my order?” into one request
• Conversation Memory: Remembers context from previous messages
• Echo Filtering: Prevents responding to your own messages
• Response Formatting: Cleans markdown for Messenger’s 2000-char limit

🔗 Nodes Used

HTTP Request, Webhook, AI Agent, OpenAI Chat Model, Simple Memory

📥 Import

Download workflow.json and import into n8n: Workflow menu → Import from File

📖 Importing guide · 🔑 Credential setup