Validate Seatable Webhooks with HMAC SHA256

The workflow JSON

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{
  "id": "W1ugowsjzt1SC4hH",
  "name": "Validate Seatable Webhooks with HMAC SHA256 Authentication",
  "tags": [],
  "nodes": [
    {
      "id": "ec4bdb4f-3c3e-4405-af80-2ad7ab3d57fc",
      "name": "200",
      "type": "n8n-nodes-base.respondToWebhook",
      "position": [
        420,
        -20
      ],
      "parameters": {
        "options": {
          "responseCode": 200
        },
        "respondWith": "noData"
      },
      "typeVersion": 1
    },
    {
      "id": "1b6c9f8c-1b5b-499d-abb5-bb1059b73ce7",
      "name": "403",
      "type": "n8n-nodes-base.respondToWebhook",
      "position": [
        420,
        180
      ],
      "parameters": {
        "options": {
          "responseCode": 403
        },
        "respondWith": "noData"
      },
      "typeVersion": 1
    },
    {
      "id": "e3976bf3-60e0-4c1c-bfdb-22ad336760a5",
      "name": "Calculate sha256",
      "type": "n8n-nodes-base.crypto",
      "position": [
        -20,
        -20
      ],
      "parameters": {
        "type": "SHA256",
        "action": "hmac",
        "binaryData": true,
        "dataPropertyName": "seatable-signature"
      },
      "typeVersion": 1
    },
    {
      "id": "5e74ba50-e0fe-41e0-9b84-7078f1d150a3",
      "name": "Seatable Webhook",
      "type": "n8n-nodes-base.webhook",
      "position": [
        -240,
        -20
      ],
      "parameters": {
        "path": "s0m3-d4nd0m-1d",
        "options": {
          "rawBody": true
        },
        "httpMethod": "POST",
        "responseMode": "responseNode"
      },
      "typeVersion": 1
    },
    {
      "id": "dbfcc59f-5411-4d99-8cde-26ae91cdd6af",
      "name": "Add nodes for processing",
      "type": "n8n-nodes-base.noOp",
      "position": [
        420,
        -220
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "a508534f-abb4-4455-b47a-1aaf56ce1124",
      "name": "hash matches",
      "type": "n8n-nodes-base.if",
      "position": [
        200,
        -20
      ],
      "parameters": {
        "conditions": {
          "string": [
            {
              "value1": "={{ String($json['seatable-signature']) }}",
              "value2": "={{ String($json.headers['x-seatable-signature'].replace(\"sha256=\", \"\")) }}"
            }
          ]
        }
      },
      "typeVersion": 1
    },
    {
      "id": "1495d5c1-3467-4639-a32d-51a6497aed51",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        -400,
        -660
      ],
      "parameters": {
        "width": 720,
        "height": 580,
        "content": "## \ud83d\udccc Validate Seatable Webhooks with HMAC SHA256 Authentication\n\nThis mini workflow is designed to **securely validate incoming Seatable webhooks** using HMAC SHA256 signature verification.\n\n### \ud83d\udd10 What it does:\n- Listens for incoming Seatable webhook requests.\n- Calculates a SHA256 HMAC hash of the raw request body using your shared secret.\n- Compares the computed hash with the `x-seatable-signature` header (after removing the `sha256=` prefix).\n- If the hashes match: responds with **200 OK** and forwards the request to subsequent nodes.\n- If the hashes don\u2019t match: responds with **403 Forbidden**.\n\n### \u26a0\ufe0f Important Notes:\nThis workflow is provided as a **template** and is not intended to work standalone. **Please duplicate it** and integrate it with your custom logic at the \"Add nodes for processing\" node.\n\nConfiguration steps:\n- Set your **secret key** in the \u201cCalculate sha256\u201d crypto node (replace the placeholder).\n- Adjust the webhook path to suit your environment (or set it to \"manual\" for testing).\n- Connect your actual logic after the verification step.\n"
      },
      "typeVersion": 1
    }
  ],
  "active": true,
  "settings": {
    "executionOrder": "v1"
  },
  "versionId": "8da47cde-25ce-459e-a74d-91ba0d5173e3",
  "connections": {
    "hash matches": {
      "main": [
        [
          {
            "node": "200",
            "type": "main",
            "index": 0
          },
          {
            "node": "Add nodes for processing",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "403",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Calculate sha256": {
      "main": [
        [
          {
            "node": "hash matches",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Seatable Webhook": {
      "main": [
        [
          {
            "node": "Calculate sha256",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}

About this workflow

Validate Seatable Webhooks with HMAC SHA256 Authentication. Uses respondToWebhook, crypto, noOp, stickyNote. Webhook trigger; 7 nodes.

Source: https://github.com/Zie619/n8n-workflows — original creator credit. Request a take-down →

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