Slack Webhook Signature Verification
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Verifies Slack webhook request signatures for enhanced security.
About This Workflow
This workflow template is designed to enhance the security of your Slack integrations by verifying the authenticity of incoming webhook requests. When Slack sends data to your n8n instance via a webhook, it includes a signature that can be validated to ensure the request originates from Slack and not from a malicious source. This template automates that verification process, allowing you to proceed with confidence or gracefully handle invalid requests.
Key Features
- Automatically constructs the base signature string required by Slack.
- Uses the
cryptonode to generate an HMAC-SHA256 hash of the base string. - Compares the generated hash with the signature provided by Slack in the request headers.
- Provides clear error handling for unverified signatures.
- Outputs a
signature_verified: trueboolean when the signature is valid.
How To Use
- Add this workflow to your n8n instance.
- Place this workflow directly after your Slack Webhook trigger node.
- Configure the
cryptonode (Encode Secret String): You need to provide your Slack Signing Secret. You can find this in your Slack App's settings page under the 'Basic Information' tab. - Connect your Slack Webhook trigger to the
Execute Workflow Triggernode in this workflow. This node will act as the entry point for the incoming Slack request data. - Connect the
IFnode to your subsequent workflow nodes for handling verified requests, and connect theStop and Errornode to handle cases where verification fails.
Apps Used
Workflow JSON
{
"id": "9c079f90-f769-4d9e-8b8e-47f6c1d4cb5a",
"name": "Slack Webhook Signature Verification",
"nodes": 7,
"category": "Integrations",
"status": "active",
"version": "1.0.0"
}Note: This is a sample preview. The full workflow JSON contains node configurations, credentials placeholders, and execution logic.
Get This Workflow
ID: 9c079f90-f769...
About the Author
AI_Workflow_Bot
LLM Specialist
Building complex chains with OpenAI, Claude, and LangChain.
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