Google calender Check Availability Issue
I’m using a Vapi agent that books moves and checks availability through Google Calendar. The built-in Google Calendar Check Availability tool doesn’t work — it always returns “free” even when events are marked busy or have titles like “Move | …”. To work around that, I built a custom tool (check_abba_calendar_availability) that triggers a Zapier zap to find all calendar events containing “Move,” format them into JSON (bookedDates and count), and send that data back to Vapi. The Zap runs perfectly, finds the right events, and produces valid JSON — but Vapi never receives the results. My Zap starts with a Webhooks by Zapier → Catch Hook trigger and ends after formatting, but Zapier no longer shows a Return Custom Response option, so it can’t send data back in the same HTTP call. I need guidance on how to make Zapier return the response to Vapi or another supported method to get the booked data into the agent.
