OpenWA Simple Integration N8N Workflow

workflow.json

{
  "name": "WhatsApp AI Bot — 3 Varieties",
  "nodes": [
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "wa-webhook",
        "options": {}
      },
      "id": "321adc8a-c16f-4b60-baa3-3c51d7f748d6",
      "name": "WA Webhook",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2.1,
      "position": [112, 544],
      "webhookId": "49cae27c-b557-4d0c-a7ab-101a3d83c8ac"
    },
    {
      "parameters": {
        "method": "POST",
        "url": "=http://openwa-api:2785/api/sessions/{{ $('WA Webhook').item.json.body.sessionId }}/messages/send-text",
        "authentication": "genericCredentialType",
        "genericAuthType": "httpHeaderAuth",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [{ "name": "Content-Type", "value": "=application/json" }]
        },
        "sendBody": true,
        "bodyParameters": {
          "parameters": [
            { "name": "chatId", "value": "={{ $json.chatId }}" },
            { "name": "text", "value": "={{ $json.output }}" }
          ]
        },
        "options": {}
      },
      "id": "52d1f993-69fb-461b-abf6-e683c288e505",
      "name": "Send WhatsApp Message",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.4,
      "position": [1632, 544],
      "credentials": { "httpHeaderAuth": { "id": "REPLACE_ME", "name": "OpenWA API Key" } }
    },
    {
      "parameters": { "model": "llama3.2:3b", "options": {} },
      "type": "@n8n/n8n-nodes-langchain.lmChatOllama",
      "typeVersion": 1,
      "position": [1008, 784],
      "id": "f731fc8d-6965-45a3-82bc-0ffe634a1173",
      "name": "Ollama Chat Model",
      "credentials": { "ollamaApi": { "id": "REPLACE_ME", "name": "Ollama account" } }
    },
    {
      "parameters": {
        "sessionIdType": "customKey",
        "sessionKey": "={{ $json.body.data.chatId }}",
        "contextWindowLength": 30
      },
      "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
      "typeVersion": 1.4,
      "position": [1184, 816],
      "id": "d29aeafc-0398-477c-9757-e0cb25799ac4",
      "name": "Simple Memory"
    },
    {
      "parameters": {
        "conditions": {
          "options": { "caseSensitive": true, "leftValue": "", "typeValidation": "strict", "version": 3 },
          "conditions": [{
            "id": "6c1bd14c-82d9-4e84-9710-f7cff64ff5e7",
            "leftValue": "={{ $json.body.data.contact.pushName }}",
            "rightValue": "YourContactName",
            "operator": { "type": "string", "operation": "equals" }
          }],
          "combinator": "and"
        },
        "options": {}
      },
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.3,
      "position": [544, 288],
      "id": "5d673758-ca77-4362-88b8-4f1c7c657332",
      "name": "Variety 1: Personal Contact"
    },
    {
      "parameters": {
        "conditions": {
          "options": { "caseSensitive": true, "leftValue": "", "typeValidation": "strict", "version": 3 },
          "conditions": [{
            "id": "447c3290-2b09-4bd5-9a20-87373df3dc3d",
            "leftValue": "={{ $json.body.data.isGroup }}",
            "rightValue": true,
            "operator": { "type": "boolean", "operation": "equals" }
          }],
          "combinator": "and"
        },
        "options": {}
      },
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.3,
      "position": [560, 512],
      "id": "360ee92f-467a-4feb-85c5-7688834a3b1b",
      "name": "Variety 2: Group Message"
    },
    {
      "parameters": {
        "conditions": {
          "options": { "caseSensitive": true, "leftValue": "", "typeValidation": "strict", "version": 3 },
          "conditions": [
            {
              "id": "424bfcff-ef4a-4911-bdea-44eb2c4cc52e",
              "leftValue": "={{ $json.body.data.isGroup }}",
              "rightValue": true,
              "operator": { "type": "boolean", "operation": "equals" }
            },
            {
              "id": "f60b4be0-1c7b-4ecd-bf65-2b3124897963",
              "leftValue": "={{ $json.body.data.body }}",
              "rightValue": "@agent",
              "operator": { "type": "string", "operation": "contains" }
            }
          ],
          "combinator": "and"
        },
        "options": {}
      },
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.3,
      "position": [560, 736],
      "id": "b9545930-1ec0-435b-8d9a-3c757ac35f17",
      "name": "Variety 3: @agent Mention"
    },
    {
      "parameters": {
        "assignments": {
          "assignments": [
            { "id": "be20df00-04bc-46aa-8f26-462af1db0dcb", "name": "output", "value": "={{ $json.output }}", "type": "string" },
            { "id": "c58843cc-e1ec-4803-97c0-b3dc97557d32", "name": "chatId", "value": "={{ $('WA Webhook').item.json.body.data.chatId }}", "type": "string" }
          ]
        },
        "options": {}
      },
      "type": "n8n-nodes-base.set",
      "typeVersion": 3.4,
      "position": [1424, 544],
      "id": "f021c824-6573-4ecb-a2ee-cc6c4c8cdd01",
      "name": "Set Message and ID"
    },
    {
      "parameters": {
        "promptType": "define",
        "text": "={{ $json.body.data.body }}",
        "options": { "systemMessage": "You are a helpful assistant." }
      },
      "type": "@n8n/n8n-nodes-langchain.agent",
      "typeVersion": 3.1,
      "position": [1072, 512],
      "id": "19742472-9a7b-4e65-8cff-a43a37065a4b",
      "name": "Simple Agent"
    }
  ],
  "pinData": {},
  "connections": {
    "WA Webhook": {
      "main": [[
        { "node": "Variety 1: Personal Contact", "type": "main", "index": 0 },
        { "node": "Variety 2: Group Message", "type": "main", "index": 0 },
        { "node": "Variety 3: @agent Mention", "type": "main", "index": 0 }
      ]]
    },
    "Ollama Chat Model": { "ai_languageModel": [[{ "node": "Simple Agent", "type": "ai_languageModel", "index": 0 }]] },
    "Simple Memory": { "ai_memory": [[{ "node": "Simple Agent", "type": "ai_memory", "index": 0 }]] },
    "Variety 3: @agent Mention": { "main": [[{ "node": "Simple Agent", "type": "main", "index": 0 }]] },
    "Set Message and ID": { "main": [[{ "node": "Send WhatsApp Message", "type": "main", "index": 0 }]] },
    "Simple Agent": { "main": [[{ "node": "Set Message and ID", "type": "main", "index": 0 }]] }
  },
  "active": false,
  "settings": { "executionOrder": "v1" }
}