Issue: GHL Calendar Free Slots API returning empty response We are trying to call the GHL calendar availability endpoint directly via API to use inside a Vapi voice assistant (bypassing GHL MCP which is confirmed broken/unstable). Endpoint being called: GET https:... cant put in here Headers: Authorization: Bearer pit-xxxx Version: 2021-07-28 Parameters tried: startDate and endDate as Unix timestamps (milliseconds) startDate and endDate as Unix timestamps (seconds) With and without timezone parameter timezone as Australia/Sydney and Australia%2FSydney Results every time: Status 200 OK Response body only contains {"traceId":"xxxx"} — no slot data What we know: Calendar ID is correct — MjoaIx5aUbVfz2XfQ--xxx Calendar has availability set — 8am to 5pm every day Australia/Sydney Booking page works perfectly in browser and shows available slots API key is valid — other GHL API calls work fine with it Question: What is the correct way to call the free slots endpoint to return actual available time slots? Is there a different endpoint or parameter format required?