n8n Workflow Uses GPT-4o-mini to Auto-Create Calendar Events from Emails

A developer has published an n8n automation workflow that eliminates the manual task of copying meeting details from emails into calendar apps. The workflow scans Gmail every 15 minutes, uses GPT-4o-mini to classify emails and extract meeting details, then automatically creates a corresponding Google Calendar event. For each detected meeting, it also generates an AI-written preparation brief — including context, talking points, and suggested questions — and delivers it to Slack with a direct calendar link. The system handles a wide range of meeting types, from Zoom confirmations and Calendly bookings to informal scheduling requests, while filtering out newsletters and promotional emails. All processed entries are logged to Google Sheets, and a confidence threshold ensures low-certainty detections are flagged for manual review rather than auto-scheduled.