Track Facebook event RSVPs in Airtable and send Slack capacity alerts

Facebook Event RSVP Webhook → Airtable Attendee Tracking → Slack Capacity Alerts

This workflow automatically tracks Facebook Event RSVPs, stores attendee data in Airtable, checks event capacity and notifies your team on Slack when the event becomes full. It eliminates manual RSVP tracking and prevents overbooking.

Quick Start: Get Up and Running Fast

1. Create a custom Facebook webhook endpoint in n8n. 2. Connect Airtable and select your preferred table. 3. Ensure required fields exist in the Airtable table. 4. Set the event capacity value. 5. Connect Slack and choose the notification channel. 6. Activate the workflow.

What It Does

This workflow begins when a new RSVP is received from a Facebook Event through a custom webhook endpoint. The incoming data is cleaned and standardized to extract only the required RSVP details, ensuring consistent processing.

Each RSVP is then stored in Airtable using an upsert operation. This ensures attendee records are created or updated correctly while preventing duplicate entries if Facebook sends the same RSVP more than once.

After storing the data, the workflow checks how many people are marked as attending for the event. If the total reaches or exceeds the defined capacity, a Slack notification is sent to the team. The workflow also records that the alert has been sent to avoid duplicate notifications.