n8n Workflow Audit: Missing Error Workflows + Slack Alerts

Know which n8n workflows are missing error handling—then get alerted in Slack

This n8n Workflow Audit: Missing Error Workflows + Slack Alerts checks your active (published) n8n workflows every Monday morning and automatically posts a clear gap report to Slack whenever it finds workflows without the expected attached error workflow.

What this workflow does

• Runs on a schedule: executes every Monday at 09:00 using a scheduled trigger.
• Audits your n8n instance: uses the n8n public API to fetch your active (published) workflows.
• Filters what to check: ignores archived workflows, excludes error-handler workflows, and skips workflows tagged with an ignoreTag.
• Detects gaps: identifies workflows that are missing an attached error workflow.
• Builds a report: creates a formatted list of uncovered workflow names and determines whether a Slack message is needed.
• Alerts only when needed (or optionally always): posts to Slack when gaps are found, and can also be configured with alertWhenClean to send an all-clear message even when everything is covered.

Use cases

• Reliability audits: ensure every production workflow has error handling before incidents happen.
• Team governance: catch newly published workflows that forgot to attach error workflows.
• SaaS operations: maintain consistent automation standards across an n8n workspace.

Technical details

• Integrations: n8n public API and Slack.
• Nodes/logic used: if, n8n, set, code, no op, slack.
• Setup requirements: self-hosted n8n with the public API enabled, an n8n API key (Settings > n8n API), and Slack credentials with a target channel.

Run a test after setting ignoreTag and alertWhenClean, then activate to keep your error workflows complete—without manual audits.