n8n Error Alerts to Slack + Log Failures in Google Sheets

Get instant n8n failure alerts in Slack—and keep a permanent error log in Google Sheets

If your n8n workflows fail, don’t wait for someone to notice. This workflow automatically sends a Slack-ready error alert with the failed execution details, and also appends the same failure record to Google Sheets for clean, searchable incident tracking.

What this workflow does

• Automatically triggers on any failed n8n execution, so failures are captured the moment they happen.
• Extracts and normalizes key error details into a single alert payload, including:
  • workflow name
  • failed node
  • error message
  • execution URL
  • execution metadata (as included in the payload)
• Sends a formatted failure alert to Slack in your chosen channel, including a link to the failed execution for fast investigation.
• Appends the failure details to Google Sheets as a new row, creating an ongoing log of errors for later review.

Use cases

• SaaS operations: Track failed automation runs and quickly troubleshoot customer-impacting issues.
• Automation engineering: Monitor fragile workflow steps (webhook nodes, API calls, parsing code) and reduce mean time to resolution.
• Team visibility: Centralize workflow failures in Slack for shared awareness, while keeping a structured Google Sheets history for audits.

Technical details

• n8n Error Trigger: fires on failed executions.
• Code node: formats and normalizes the failure payload into a Slack-ready message.
• Slack node: posts alerts to a specified Slack channel (requires a Slack bot token with chat:write).
• Google Sheets integration: appends a new row per failure.
• Sticky Note: included as part of the workflow setup/clarity.

Setup requirements

• Slack workspace + Slack credential, and set the destination channel (e.g., #alerts).
• Google account + Google Sheets credential, and select the target spreadsheet and sheet/tab IDs.
• Google Sheet header row must match: failed_at, workflow_name, failed_node, error_message, execution_url.

Customization note: The alert text is already prepared, so you can swap the Slack destination for other notification destinations like Discord, Telegram, or email by changing the destination node.