WhatsApp AI Chatbot with OpenAI

The workflow JSON

Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →

{
  "name": "WhatsApp AI Chatbot",
  "nodes": [
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "whatsapp-webhook",
        "responseMode": "responseNode",
        "options": {}
      },
      "id": "a1b2c3d4-1111-4000-8000-000000000001",
      "name": "WhatsApp Webhook",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2,
      "position": [
        240,
        300
      ]
    },
    {
      "parameters": {
        "assignments": {
          "assignments": [
            {
              "id": "set-user-msg",
              "name": "userMessage",
              "value": "={{ $json.body.messages[0].text.body }}",
              "type": "string"
            },
            {
              "id": "set-phone",
              "name": "phoneNumber",
              "value": "={{ $json.body.messages[0].from }}",
              "type": "string"
            }
          ]
        },
        "options": {}
      },
      "id": "a1b2c3d4-1111-4000-8000-000000000002",
      "name": "Extract Message",
      "type": "n8n-nodes-base.set",
      "typeVersion": 3.4,
      "position": [
        460,
        300
      ]
    },
    {
      "parameters": {
        "resource": "chat",
        "operation": "message",
        "model": "gpt-4o",
        "messages": {
          "values": [
            {
              "role": "system",
              "content": "You are a helpful WhatsApp customer support assistant. Be concise, friendly, and helpful. Keep responses under 300 characters when possible. Answer in the same language the user writes in."
            },
            {
              "role": "user",
              "content": "={{ $json.userMessage }}"
            }
          ]
        },
        "options": {
          "temperature": 0.7,
          "maxTokens": 500
        }
      },
      "id": "a1b2c3d4-1111-4000-8000-000000000003",
      "name": "OpenAI Chat",
      "type": "@n8n/n8n-nodes-langchain.openAi",
      "typeVersion": 1.6,
      "position": [
        680,
        300
      ],
      "credentials": {
        "openAiApi": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "assignments": {
          "assignments": [
            {
              "id": "set-reply",
              "name": "replyText",
              "value": "={{ $json.message.content }}",
              "type": "string"
            }
          ]
        },
        "options": {}
      },
      "id": "a1b2c3d4-1111-4000-8000-000000000004",
      "name": "Format Reply",
      "type": "n8n-nodes-base.set",
      "typeVersion": 3.4,
      "position": [
        900,
        300
      ]
    },
    {
      "parameters": {
        "respondWith": "json",
        "responseBody": "={{ JSON.stringify({ messaging_product: 'whatsapp', to: $('Extract Message').item.json.phoneNumber, type: 'text', text: { body: $json.replyText } }) }}",
        "options": {
          "responseCode": 200
        }
      },
      "id": "a1b2c3d4-1111-4000-8000-000000000005",
      "name": "Respond to Webhook",
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.1,
      "position": [
        1120,
        300
      ]
    }
  ],
  "connections": {
    "WhatsApp Webhook": {
      "main": [
        [
          {
            "node": "Extract Message",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Extract Message": {
      "main": [
        [
          {
            "node": "OpenAI Chat",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "OpenAI Chat": {
      "main": [
        [
          {
            "node": "Format Reply",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Format Reply": {
      "main": [
        [
          {
            "node": "Respond to Webhook",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "settings": {
    "executionOrder": "v1"
  },
  "staticData": null
}

Credentials you'll need

Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.

• openAiApi

About this workflow

WhatsApp AI Chatbot. Uses openAi. Webhook trigger; 5 nodes.

Source: https://github.com/mlnjsh/n8n-workflows-mega/blob/main/workflows/ai-chatbots/01-whatsapp-ai-chatbot.json — original creator credit. Request a take-down →

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