Send Instagram Auto Dms to Post Commenters Using Meta Graph API

The workflow JSON

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{
  "nodes": [
    {
      "id": "a9845bc8-c7fc-4e17-91c2-ca008222a59f",
      "name": "Trigger on Instagram Comment",
      "type": "n8n-nodes-base.webhook",
      "position": [
        -1312,
        480
      ],
      "parameters": {
        "path": "ecc03c31-5ab4-4261-84fb-c774e06fd579",
        "options": {},
        "httpMethod": "POST"
      },
      "typeVersion": 2.1
    },
    {
      "id": "26c4519f-c884-4d38-aa24-860610c3a47b",
      "name": "Match Comment Text",
      "type": "n8n-nodes-base.filter",
      "position": [
        -848,
        464
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "version": 3,
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "or",
          "conditions": [
            {
              "id": "3fc908dc-bef7-4a0e-875d-90e7a48f3fc8",
              "operator": {
                "type": "string",
                "operation": "equals"
              },
              "leftValue": "={{ $json.body.entry[0].changes[0].value.text }}",
              "rightValue": "DM"
            },
            {
              "id": "811261e0-c0df-4503-97a8-41ce4ca7ceaa",
              "operator": {
                "type": "string",
                "operation": "equals"
              },
              "leftValue": "={{ $json.body.entry[0].changes[0].value.text }}",
              "rightValue": "dm"
            }
          ]
        }
      },
      "typeVersion": 2.3
    },
    {
      "id": "ac153128-12c5-4dd6-a2e6-5f37e801dff4",
      "name": "Data",
      "type": "n8n-nodes-base.set",
      "position": [
        -640,
        464
      ],
      "parameters": {
        "options": {},
        "assignments": {
          "assignments": [
            {
              "id": "a9c31aa4-afde-4532-be16-4650d907e0da",
              "name": "comment_id",
              "type": "string",
              "value": "={{ $json.body.entry[0].changes[0].value.id }}"
            },
            {
              "id": "2cf8ff04-4305-46be-b745-82f59d7570c9",
              "name": "my_ig_id",
              "type": "string",
              "value": "={{ $json.body.entry[0].id }}"
            },
            {
              "id": "48481d57-2485-4c87-aa1b-7d5780fb8d3d",
              "name": "message",
              "type": "string",
              "value": "Your-Message-Here"
            }
          ]
        }
      },
      "typeVersion": 3.4
    },
    {
      "id": "fdd71ec5-f058-4c03-82cd-a39f686f1873",
      "name": "Send DM",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        -400,
        464
      ],
      "parameters": {
        "url": "=https://graph.facebook.com/v25.0/{{ $json.my_ig_id }}/messages",
        "method": "POST",
        "options": {},
        "jsonBody": "={\n  \"recipient\": {\n    \"comment_id\": \"{{ $json.comment_id }}\"\n  },\n  \"message\": {\n    \"text\": \"{{ $json.message }}\"\n  }\n}",
        "sendBody": true,
        "specifyBody": "json",
        "authentication": "genericCredentialType",
        "genericAuthType": "httpQueryAuth"
      },
      "credentials": {
        "httpBasicAuth": {
          "name": "<your credential>"
        },
        "httpQueryAuth": {
          "name": "<your credential>"
        }
      },
      "typeVersion": 4.3
    },
    {
      "id": "a65b590e-2259-4aaa-b4b1-3035eef22786",
      "name": "Match Post ID",
      "type": "n8n-nodes-base.if",
      "position": [
        -1104,
        480
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "version": 3,
            "leftValue": "",
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "combinator": "and",
          "conditions": [
            {
              "id": "5bad8129-a374-4957-9762-5413b48850c3",
              "operator": {
                "type": "string",
                "operation": "equals"
              },
              "leftValue": "={{ $json.body.entry[0].id }}",
              "rightValue": "Your-Instagram-Post-ID"
            },
            {
              "id": "327ce172-bd11-4a03-9c5a-60bd5c569eac",
              "operator": {
                "type": "string",
                "operation": "notEquals"
              },
              "leftValue": "={{ $json.body.entry[0].changes[0].value.from.id }}",
              "rightValue": "Your-Instagram-Account-ID"
            }
          ]
        }
      },
      "typeVersion": 2.3
    },
    {
      "id": "21bc1730-3c77-469f-b7e8-916f45e696a2",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -1904,
        288
      ],
      "parameters": {
        "width": 512,
        "height": 512,
        "content": "## \ud83d\ude80 Instagram Auto-DM Lead Magnet\n\n### How it works\n\n1. Listens for live comment payloads via the Meta/Instagram Webhook.\n2. Verifies the comment is on a specific promotional post (and ignores your own replies).\n3. Checks if the commenter typed the exact trigger keyword.\n4. Automatically sends a direct message to the user with the requested document or link.\n\n### \u26a0\ufe0f CRITICAL SETUP STEPS \u26a0\ufe0f\n\n- [ ] **Webhook:** Connect your Meta Developer App and subscribe to Instagram `comments`.\n- [ ] **Target Post:** Open the `Match Post ID` node. Paste your **Instagram Post ID** and your **Instagram Account ID** to prevent self-looping.\n- [ ] **Trigger Word:** Open the `Match Comment Text` node. Set your exact trigger words (e.g., \"DM\", \"Send it\").\n- [ ] **The Message:** Open the `Data` node. Replace \"Your-Message-Here\" with your custom message and link!\n- [ ] **Auth:** Add your Graph API credentials in the `Send DM` node."
      },
      "typeVersion": 1
    },
    {
      "id": "731cf544-0075-4914-bbe4-b9bb1911c438",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -1376,
        320
      ],
      "parameters": {
        "color": 7,
        "width": 208,
        "height": 304,
        "content": "## 1. \ud83d\udce5 Receive Comment\n\nListens for comment payloads pushed from the Meta Webhook."
      },
      "typeVersion": 1
    },
    {
      "id": "cdc60ccf-3140-45e5-af3d-5b15474d53df",
      "name": "Sticky Note2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -1152,
        304
      ],
      "parameters": {
        "color": 7,
        "width": 448,
        "height": 352,
        "content": "## 2. \ud83c\udfaf Filter & Validate\n\n\u26a0\ufe0f **ACTION REQUIRED:**\n1. Open **Match Post ID** to add your Post ID & Account ID.\n2. Open **Match Comment Text** to define your trigger keyword."
      },
      "typeVersion": 1
    },
    {
      "id": "01163d2a-6321-4a2d-a893-82bce72cdd75",
      "name": "Sticky Note3",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -672,
        304
      ],
      "parameters": {
        "color": 7,
        "width": 432,
        "height": 352,
        "content": "## 3. \ud83d\udcac Prepare & Send DM\n\n\u26a0\ufe0f **ACTION REQUIRED:**\nOpen the **Data** node to type the custom message and link you want to send to your followers! (The API handles the rest)."
      },
      "typeVersion": 1
    }
  ],
  "connections": {
    "Data": {
      "main": [
        [
          {
            "node": "Send DM",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Match Post ID": {
      "main": [
        [
          {
            "node": "Match Comment Text",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Match Comment Text": {
      "main": [
        [
          {
            "node": "Data",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Trigger on Instagram Comment": {
      "main": [
        [
          {
            "node": "Match Post ID",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}

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.

• httpBasicAuth
• httpQueryAuth

About this workflow

Automate the most popular growth hack on Instagram: "Comment 'DM' to get the link!"

Source: https://n8n.io/workflows/15206/ — original creator credit. Request a take-down →

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