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 →