WhatsApp AI Chatbot with OpenAI

The workflow JSON

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{
  "_meta": {
    "template": "WhatsApp Autoresponder",
    "version": "1.1.0",
    "author": "Jos\u00e9 Neto @zNeto.AI",
    "note": "Replace all [PLACEHOLDER] values before activating."
  },
  "nodes": [
    {
      "id": "node_001",
      "name": "WhatsApp Webhook",
      "type": "n8n-nodes-base.webhook",
      "description": "Receives incoming WhatsApp messages via Meta webhook",
      "parameters": {
        "httpMethod": "POST",
        "path": "[WEBHOOK_PATH]"
      }
    },
    {
      "id": "node_002",
      "name": "Message Parser",
      "type": "n8n-nodes-base.function",
      "description": "Extracts sender ID, message text, and timestamp from WhatsApp payload",
      "parameters": {
        "functionCode": "// Parse WhatsApp Business API payload\n// [SANITIZED]"
      }
    },
    {
      "id": "node_003",
      "name": "Context Manager \u2014 Load",
      "type": "n8n-nodes-base.function",
      "description": "Retrieves conversation history for the sender. Returns empty array if first contact.",
      "parameters": {
        "functionCode": "// Load context from store keyed by sender ID\n// [SANITIZED]"
      }
    },
    {
      "id": "node_004",
      "name": "OpenAI \u2014 Response Generator",
      "type": "n8n-nodes-base.httpRequest",
      "description": "Generates context-aware reply using GPT-4o and full conversation history",
      "parameters": {
        "method": "POST",
        "url": "https://api.openai.com/v1/chat/completions",
        "headers": {
          "Authorization": "Bearer [OPENAI_API_KEY]"
        },
        "body": {
          "model": "gpt-4o",
          "messages": "[SYSTEM_PROMPT + CONVERSATION_HISTORY + CURRENT_MESSAGE]",
          "temperature": 0.5,
          "max_tokens": 300
        }
      }
    },
    {
      "id": "node_005",
      "name": "WhatsApp \u2014 Send Reply",
      "type": "n8n-nodes-base.httpRequest",
      "description": "Delivers the AI-generated response to the customer via WhatsApp Business API",
      "parameters": {
        "method": "POST",
        "url": "https://graph.facebook.com/v18.0/[PHONE_NUMBER_ID]/messages",
        "headers": {
          "Authorization": "Bearer [META_ACCESS_TOKEN]"
        }
      }
    },
    {
      "id": "node_006",
      "name": "Context Manager \u2014 Save",
      "type": "n8n-nodes-base.function",
      "description": "Appends current exchange to conversation history and persists to store",
      "parameters": {
        "functionCode": "// Save updated context keyed by sender ID\n// [SANITIZED]"
      }
    }
  ],
  "connections": {
    "node_001": {
      "next": "node_002"
    },
    "node_002": {
      "next": "node_003"
    },
    "node_003": {
      "next": "node_004"
    },
    "node_004": {
      "next": "node_005"
    },
    "node_005": {
      "next": "node_006"
    }
  }
}

About this workflow

N8N Automation Templates. Uses httpRequest. Webhook trigger; 6 nodes.

Source: https://github.com/joseneto-ai/n8n-automation-templates/blob/main/whatsapp-autoresponder/workflow.json — original creator credit. Request a take-down →

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