How to Set Up Slack Notifications for New Incoming Messages

This guide explains how to send Slack notifications automatically whenever a new inbound message is received (from WhatsApp, Live Chat, Instagram, etc.) using Webhook + n8n workflow automation.

Overview

What this setup does:

  • Listens for new inbound messages in your system

  • Sends a real-time notification to a Slack channel

  • Works for all channels (WhatsApp, Live Chat, Instagram, etc.)

Tools used:

  • K-LINK Developer Tools

  • Webhook (Inbound Message Event)

  • n8n (workflow automation)

  • Slack App (Bot + Permissions)

Step 1: Create a New App in Developer Tools

  1. Go to Settings → Developer Tools

  2. Click Create New App

  3. Enter:

    • App Name: Slack Noti (or any name)

    • Environment: Production

  4. Click Create App

  5. Click Manage on the created app

Step 2: Enable Inbound Message Webhook

  1. Scroll to Webhook / Notification Settings

  2. Enable:

    • Inbound Message Received

  3. This event will trigger whenever:

    • A new message arrives from any channel

    • WhatsApp, Live Chat, Instagram, etc.

📌 The system will now send a webhook payload when a new message comes in.

Step 3: Create a Webhook in n8n

3.1 Create a New Workflow

  1. Open n8n

  2. Create a New Workflow

  3. Add a Webhook Node

    • HTTP Method: POST

    • Path: auto-generated

  4. Save the node

3.2 Copy Webhook URL

  1. Copy the Test Webhook URL

  2. Go back to Developer Tools → App Settings

  3. Paste the webhook URL into the Inbound Message Webhook Endpoint

  4. Click Save

Step 4: Test the Webhook

  1. In n8n, click Listen for Webhook

  2. Send a test message from any channel (e.g. Live Chat)

  3. Confirm:

    • Webhook receives payload

    • Message content appears in n8n

✅ If you see the message data, webhook is working correctly.

Step 5: Create a Slack App

5.1 Create Slack App

  1. Go to Slack API → Your Apps

  2. Click Create New App

  3. Choose From Scratch

  4. Enter:

    • App Name: K-LINK

    • Workspace: Select your workspace

  5. Click Create App

5.2 Configure OAuth & Permissions

  1. Go to OAuth & Permissions

  2. Under Bot Token Scopes, add:

    • chat:write

    • channels:read

    • channels:write

  3. Click Install App to Workspace

  4. Copy:

    • Bot User OAuth Token

    • Signing Secret

Step 6: Connect Slack to n8n

  1. In n8n, add a Slack Node

  2. Choose Send Message

  3. Create New Credentials

  4. Paste:

    • Access Token: Bot User OAuth Token

    • Signing Secret

  5. Save credentials

Step 7: Send Webhook Data to Slack

  1. Connect:

    • Webhook Node → Slack Node

  2. Configure Slack node:

    • Select Slack Channel

    • Message content example:

  3. Save workflow

  4. Activate workflow

Step 8: Final Test

  1. Send a new message from any channel

  2. Confirm:

    • Webhook receives message

    • Slack receives notification instantly

🎉 Done! Slack notifications are now live.

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