Slack Webhook - Verify Signature

Manual

High

Nodes

Manual

Trigger

High

Complexity

7/22/2025

Added

Workflow Overview

Total Nodes

Node Types

stop And Error

Stop and Error

1 node

execute Workflow Trigger

Execute Workflow Trigger

1 node

code

Make Slack Verif Token

1 node

crypto

Encode Secret String

1 node

sticky Note

Sticky Note, Sticky Note1, Sticky Note2, Sticky Note3, Sticky Note4

5 nodes

set

Set Verified to True

1 node

merge

Merge

1 node

Workflow JSON

7.89 KB

{
  "id": "84dT8cFL0FV8ZGPx",
  "meta": {
    "instanceId": "85d2d2ffc8886227640b031e8f18fdfe6c91f530d34ec1a8b1f13727419ae956"
  },
  "name": "Slack Webhook - Verify Signature",
  "tags": [],
  "nodes": [
    {
      "id": "b12fe8e7-45c4-4021-826e-3ae430e34001",
      "name": "Make Slack Verif Token",
      "type": "n8n-nodes-base.code",
      "position": [
        900,
        400
      ],
      "parameters": {
        "jsCode": "function encodeFormData(data) {\n  const encodedData = Object.keys(data)\n    .map(key => encodeURIComponent(key) + '=' + encodeURIComponent(data[key]))\n    .join('&')\n    .replaceAll(\"%20\", \"+\") // Slack does not encode \"+\" signs\n    .replaceAll(\"*\", \"%2A\") // Slack encodes \"*\" signs\n    .replaceAll(\"~\", \"%7E\"); // Slack encodes \"~\" signs\n    \n  return encodedData;\n}\n\nfunction buildSigBaseString(requestJson) {\n  const version = \"v0\"; // Slack Webhook version (Always v0 for the moment)\n  \n  const timestamp = requestJson.headers...

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