Create an intelligent Facebook Messenger chatbot with GPT-4o-mini & message memory
Needs changesNeeds changes. This template uses 1 thing(s) that n8n 3.0 removes: AI Agent v1 (old agent modes). 1 breaking item(s) found. Static check, last run 2026-10-19.
What to replace before upgrading
| Removed in 3.0 | Replace with |
|---|---|
| AI Agent v1 (old agent modes) AI Agent (v1.7) | Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent. |
Nodes used (10)
- Webhook
n8n-nodes-base.webhook - If
n8n-nodes-base.if - Respond to Webhook
n8n-nodes-base.respondToWebhook - Code
n8n-nodes-base.code - HTTP Request
n8n-nodes-base.httpRequest - Wait
n8n-nodes-base.wait - Simple Memory
@n8n/n8n-nodes-langchain.memoryBufferWindow - OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi - AI Agent
@n8n/n8n-nodes-langchain.agent - Edit Fields (Set)
n8n-nodes-base.set
What it does
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