Automated Slack Channel Inactivity Audit & Report Generator for Workspace Cleanup

Automated Slack Channel Audit Workflow with Chatbot and GPT-4.1

> Automatically scans all public Slack channels weekly to detect those with no activity in the past 30 days, then generates and sends a detailed inactivity report to admins for review and action. Helps keep your Slack workspace clean, relevant, and clutter-free.

🧑‍💼 Who’s it for

This workflow is built for: Slack Workspace Admins** IT or Ops Managers** HR/Compliance Teams** …who want to maintain a clean and active Slack workspace by regularly reviewing inactive channels.

⚙️ How it works / What it does

This automated n8n workflow: Runs weekly via a scheduled trigger. Fetches all public Slack channels in the workspace. Checks message history of each channel for activity. Filters channels that have had no discussion in the past 30 days. Generates a Slack-friendly report with key metadata (name, member count, purpose, etc.). Sends the report to a Slack channel for admin review and possible action (e.g., archive, engage, repurpose).

🛠️ How to set up

Configure your Slack App Go to https://api.slack.com/apps → Create App Add the following OAuth scopes to your Bot Token: channels:read → to get list of public channels channels:history → to fetch message history users:read → to personalize report (optional) chat:write → to post the report to a Slack channel

Install the app in your workspace
Copy the Bot User OAuth Token
Add it to your n8n Slack credentials under "Slack API"

Customize the schedule in the "Weekly Schedule Trigger" node to control report frequency.

Connect your Slack workspace to the workflow using your credentials.

✅ Requirements

n8n (self-hosted or cloud) Slack App with: channels:read channels:history chat:write Active channels and member data A designated Slack channel to receive the report

🔧 How to customize the workflow

| Component | Customization Options | |----------|------------------------| | ⏱️ Schedule Trigger | Change to daily, monthly, etc. | | 📅 Inactivity Threshold | Modify Filter channel with last discussion 30 days ago to 60/90 days | | 📊 Report Formatting | Tweak the Consume slack report node to change formatting or summary | | 💬 Output Channel | Change target channel in Send Channel Inactivity Report | | 🚫 Auto-archiving | Add logic to archive channels with 0 members or activity (using Slack API) |

📝 Slack Permissions Reference

| Action | Slack Scope Required | |--------|-----------------------| | Get all public channels | channels:read | | Get message history of a channel | channels:history | | Post message to Slack | chat:write | | Get user info (optional) | users:read |