Using n8n with Slack for Automated Alerts

Introduction

Integrate Slack with n8n workflows to deliver real-time alerts and notifications to team channels, improving incident response.

Prerequisites

• n8n v1.0+
• Slack workspace and API token

Step 1: Create Slack App

1. In Slack API dashboard, create new app.
2. Enable chat:write scope and install to workspace.
3. Copy Bot User OAuth Token.

Step 2: Add Slack Credentials in n8n

In n8n UI, navigate to Credentials > Add Slack:

• API Token: paste Bot OAuth token.

Step 3: Create Workflow

1. Trigger: Webhook or schedule.
2. Next Node: Slack node, configure:
   • Resource: Message
   • Operation: Post Message
   • Channel: #alerts
   • Text: {{ $json["eventType"] }} occurred at {{ $json["timestamp"] }}

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Step 4: Add Conditions

Use IF node to filter events:

{{$node["Webhook"].json["status"] === 'error'}}

Then connect IF true to Slack node.

Step 5: Test and Deploy

Execute workflow manually or trigger external event. Verify message in Slack channel.

Summary

n8n’s Slack integration enables automated, conditional alerts directly in your communication channels, streamlining operations and on-call workflows.