REX
REX handles the whole booking conversation. He reads live availability from your real calendar, offers only slots that exist, holds the booking while the caller decides, writes it in, and sends the confirmation email — then tells your team it happened.
A receptionist who never has a queue and never double-books.
REX at work.
This is the real flow. The log underneath each step is what fires while it happens.
Built for
Clinics, salons, trades, viewings, consultations — anywhere a missed call is a missed appointment.
- Vapi
- Cal.com
- Email confirmations
- Live availability
- Reschedule & cancel
Step by step.
Answers and qualifies
Works out what the caller actually needs booking and how long it will take before touching the diary.
Reads live availability
Queries the real calendar in the moment. Slots offered are slots that exist — there is no cached list to go stale.
Offers real options
Two or three concrete times, spoken naturally. If none work, he widens the window rather than dead-ending.
Writes the booking
Creates the appointment with the caller's details, the reason for the visit, and the duration attached.
Confirms in writing
A confirmation email goes out while the caller is still on the line, so they hang up with proof.
Handles the awkward ones
Reschedules and cancellations are the same conversation in reverse — he finds the existing booking and moves or drops it.
Why availability matters
Most booking bots read a cached list of slots and then double-book. REX queries the diary at the moment of the offer, so if a colleague booked that slot ninety seconds ago it is already gone from what he offers.
What it plugs into.
All of it talks to systems you already run.
Vapi
Voice, turn-taking, and the inbound or outbound number.
Cal.com
Live slot lookup, create, reschedule and cancel.
Confirmation and reminder mail on booking.
Slack
Optional ping to the team when a booking lands.
Want REX running on your systems?
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