Send WhatsApp Message via WWebJS API

The workflow JSON

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{
  "name": "WWebJS API Demo \u2014 send a WhatsApp message in 3 steps",
  "nodes": [
    {
      "id": "d1000001-0001-4000-8000-000000000001",
      "name": "Click \u25b6 Test Workflow to start",
      "type": "n8n-nodes-base.manualTrigger",
      "position": [
        260,
        300
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "d1000001-0002-4000-8000-000000000002",
      "name": "1. List All Sessions",
      "type": "n8n-nodes-wwebjs-api.wWebJsApi",
      "position": [
        500,
        300
      ],
      "parameters": {
        "resource": "session",
        "operation": "getSessions"
      },
      "typeVersion": 1
    },
    {
      "id": "d1000001-0006-4000-8000-000000000006",
      "name": "Pick First Session",
      "type": "n8n-nodes-base.set",
      "position": [
        740,
        300
      ],
      "parameters": {
        "mode": "manual",
        "duplicateItem": false,
        "assignments": {
          "assignments": [
            {
              "id": "field-sessionId",
              "name": "sessionId",
              "value": "={{ $json.result[0] }}",
              "type": "string"
            }
          ]
        },
        "options": {}
      },
      "typeVersion": 3.4
    },
    {
      "id": "d1000001-0003-4000-8000-000000000003",
      "name": "2. Get Session Status",
      "type": "n8n-nodes-wwebjs-api.wWebJsApi",
      "position": [
        980,
        300
      ],
      "parameters": {
        "resource": "session",
        "operation": "getStatus",
        "sessionId": "={{ $json.sessionId }}"
      },
      "typeVersion": 1
    },
    {
      "id": "d1000001-0004-4000-8000-000000000004",
      "name": "3. Send WhatsApp Message",
      "type": "n8n-nodes-wwebjs-api.wWebJsApi",
      "position": [
        1220,
        300
      ],
      "parameters": {
        "resource": "client",
        "operation": "sendMessage",
        "sessionId": "={{ $('Pick First Session').item.json.sessionId }}",
        "chatId": "REPLACE_WITH_NUMBER@c.us",
        "contentType": "string",
        "content": "Hello from n8n! \u2705 This message was sent using the WhatsApp Web API (WWebJS) community node."
      },
      "typeVersion": 1
    },
    {
      "id": "d1000001-1001-4000-8000-000000000001",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        60,
        20
      ],
      "parameters": {
        "width": 1380,
        "height": 230,
        "color": 2,
        "content": "## WWebJS API Demo \u2014 send a WhatsApp message in 3 steps\n\n### How it works\n1. Click **Test Workflow** to start manually (no webhook needed).\n2. **List All Sessions** calls `/session/getSessions` \u2192 returns `{ success, result: [\"session1\", \"session2\", ...] }`.\n3. **Pick First Session** extracts `result[0]` so only one session is used, even if you have many.\n4. **Get Session Status** verifies the session `state` is `CONNECTED`.\n5. **Send WhatsApp Message** sends a test message to the phone number you set.\n\n### Setup\n1. Add your WWebJS API credentials (base URL of your wwebjs-api server + optional API key).\n2. Replace `REPLACE_WITH_NUMBER@c.us` in the last node with a real phone number (e.g. `34612345678@c.us`).\n3. Press **Test Workflow** and check your phone!"
      },
      "typeVersion": 1
    },
    {
      "id": "d1000001-1002-4000-8000-000000000002",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        180,
        250
      ],
      "parameters": {
        "width": 240,
        "height": 140,
        "content": "## Start\nManual trigger \u2014 just press \u25b6"
      },
      "typeVersion": 1
    },
    {
      "id": "d1000001-1003-4000-8000-000000000003",
      "name": "Sticky Note2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        420,
        250
      ],
      "parameters": {
        "width": 500,
        "height": 140,
        "content": "## Session\nLists sessions, picks `result[0]`, and checks `state: CONNECTED`."
      },
      "typeVersion": 1
    },
    {
      "id": "d1000001-1004-4000-8000-000000000004",
      "name": "Sticky Note3",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1140,
        250
      ],
      "parameters": {
        "width": 260,
        "height": 140,
        "content": "## Send message\nSends a test WhatsApp message to the number you set."
      },
      "typeVersion": 1
    }
  ],
  "connections": {
    "Click \u25b6 Test Workflow to start": {
      "main": [
        [
          {
            "node": "1. List All Sessions",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "1. List All Sessions": {
      "main": [
        [
          {
            "node": "Pick First Session",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Pick First Session": {
      "main": [
        [
          {
            "node": "2. Get Session Status",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "2. Get Session Status": {
      "main": [
        [
          {
            "node": "3. Send WhatsApp Message",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}

About this workflow

WWebJS API Demo — send a WhatsApp message in 3 steps. Uses n8n-nodes-wwebjs-api. Event-driven trigger; 9 nodes.

Source: https://github.com/vgpastor/n8n-nodes-wwebjs-api/blob/c72a65fd82963935b0cae43de94b8a206da241f8/templates/template-demo-video.json — original creator credit. Request a take-down →

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