# Cal.com and Volty > Volty offers open Cal.com slots on WhatsApp and books, confirms or cancels appointments when you allow it. Volty reads your Cal.com open slots and bookings, offers patients times that are free, and books or cancels appointments when you allow it. Talk to Volty · Free trial Updated 2 Nov 2026 ## An appointment for tomorrow Volty reads the open slots and books the one the patient picks. JW Jessica Wong WhatsApp · Patient Hi, I hurt my lower back at the gym. Can I see a physio tomorrow evening? Checked Cal.com slots · Initial assessment · 60 min · Tue 6 pm, 7 pm Volty Sorry to hear that, Jessica. An initial assessment is 60 minutes at $120. Tomorrow evening has: Initial assessment · Tue 18 Nov 6:00 pm · 7:00 pm 6pm Created booking · Initial assessment · Jessica Wong · Tue 6:00 pm Volty Booked for tomorrow at 6pm with Kumar. Wear loose clothing, and bring any scans you have. Google Calendar Clinic bookings Mon 17 Tue 18 9a · 10a · 11a · 12p · 1p · 2p · 3p · 4p Follow-up · Lee · Assessment · Brooks Follow-up · Silva · Assessment · Jessica Wong ## What Volty does with Cal.com Cal.com runs bookings for clinics and practices that want their own booking pages. Volty connects to Cal.com with one sign-in. It can read your event types, open slots and bookings, so a patient asking on WhatsApp is offered times that are free. When an admin turns it on, Volty books, confirms or cancels the appointment in Cal.com. - Only open slots · Times come from Cal.com's own availability. - Booked in the chat · The patient picks a time and Volty books it. - Cancel and rebook · When those tools are on, Volty keeps Cal.com in step. - Changes start Off · Each write can wait for a colleague to approve. Connects with One Cal.com sign-in Volty reads Event types, open slots and bookings Volty can change Creates, confirms and cancels bookings, when turned on Setup A few minutes Category Calendar & booking Only the slots Cal.com shows as open. ### A cancellation The patient's back is better. Volty finds the booking and cancels it. JW Jessica Wong WhatsApp · Patient Feeling much better today, can I cancel tomorrow's appointment? Found Cal.com booking · Initial assessment · Tue 18 Nov 6:00 pm Cancelled booking · Reason: patient recovered Volty Done, Jessica, tomorrow's appointment is cancelled. Glad you're feeling better. Message us if it comes back. ## As an automation Describe it to Volty in a sentence; it drafts the automation and an admin turns it on. Day-before reminder - When · A booking is tomorrow · Booked by Volty or online - Step 1 · Reminder to the patient · An approved template - Step 2 · Handles the replies · Confirms or offers a new time - Step 3 · Updates Cal.com · If they cancel or move He booked on WhatsApp last night. ## How Volty connects to Cal.com An admin signs in to Cal.com from the Sources page and picks the tools Volty may use. - 01 · Sign in to Cal.com · With the account that owns the event types. - 02 · Turn on the reads · Event types, slots and bookings. - 03 · Allow booking · Turn on create and cancel when you are ready. ### The tools Volty gets Each one is a switch on the Sources page in Volty. - List event types · Reads - Check open slots · Reads - List bookings · Reads - Create a booking · Changes - Confirm a booking · Changes - Cancel a booking · Changes Reading tools can be turned on straight away. Anything that changes Cal.com starts Off, and once on it can be set to check with staff, so each change waits for a colleague. ## Common questions ### Can Volty change records in Cal.com? Only when an admin allows it. Every tool has its own switch: tools that only read can be turned on, and tools that change a record start Off. A tool that is on can be set to check with staff, so each change waits for a colleague to approve it. ### How much does it cost to connect Cal.com with Volty? Every Volty plan includes seats, active contacts and AI credits and starts with a free 7-day trial, and the plan prices are on voltade.com/pricing. Meta bills message charges separately for WhatsApp, Instagram and Messenger. ## Related integrations - Calendly Calendar & booking - Google Calendar Calendar & booking - Plato Medical Industry & regional systems - Zoom Calendar & booking - Google Meet Calendar & booking All integrations ## Start your free trial Talk to Volty · Start your free trial Sign up for our 7-day trial. No credit card needed. ## Not convinced? Hear more from our CEO and Volty The Leonard and Volty Show · 8 October 2026 ### Meta now charges for WhatsApp replies The Leonard and Volty Show · 1 October 2026 ### Too busy to hire? The Leonard and Volty Show · 21 September 2026 ### From $500 chatbot jobs to agentic AI The Leonard and Volty Show · 10 September 2026 ### Your AI is a new employee The Leonard and Volty Show · 4 September 2026 ### Trust in the AI world The Leonard and Volty Show · 29 August 2026 ### Does the AI model matter? The Leonard and Volty Show · 19 August 2026 ### What are AI agents? Meta now charges for WhatsApp replies. Here's what it means for your business, 8 October 2026 ## Links - [Calendar & booking](https://voltade.com/integrations?category=calendar) - [CalendlyCalendar & booking](https://voltade.com/integrations/calendly) - [Google CalendarCalendar & booking](https://voltade.com/integrations/google-calendar) - [Plato MedicalIndustry & regional systems](https://voltade.com/integrations/plato) - [ZoomCalendar & booking](https://voltade.com/integrations/zoom) - [Google MeetCalendar & booking](https://voltade.com/integrations/google-meet) - [All integrations](https://voltade.com/integrations)