Integrations · Scheduling
AI receptionist for Cal.com
The short answer
Yes. FirstVoice connects straight to Cal.com, checks your real free times and books the caller in during the call.
Last updated
Try it
Watch a call go into Cal.com.
Incoming call
Example caller · Mobile
An example call, sped up. Your setup follows your own questions and rules.
- A caller asks for an appointment
- FirstVoice checks your real free times in Cal.com
- It books them into the right event type
- Cal.com sends its usual confirmation
- Reschedules and cancellations are handled in Cal.com too
FirstVoice with Cal.com
Phone bookings go straight into Cal.com.
What happens on a call
- A caller asks for an appointment
- FirstVoice checks your real free times in Cal.com
- It books them into the right event type
- Cal.com sends its usual confirmation
- Reschedules and cancellations are handled in Cal.com too
Getting connected
- You create a connection key in your Cal.com settings and send it to us
- We set up and test everything, and you can switch it off any time
Nothing changes for your team
You keep Cal.com exactly as it is. Your team, your phone number and the way you work don't change. FirstVoice simply answers the calls you can't, and puts the results into Cal.com.
Technical details, for whoever looks after your software
FirstVoice with Cal.com
| Check availability during the call | Yes |
|---|---|
| Create bookings, jobs or leads | Yes |
| Recognise returning callers | No |
| Add call notes and summaries | No |
| Trigger follow-up texts or emails | Yes |
Cal.com connection details
| Category | Scheduling |
|---|---|
| Markets | Global |
| API documentation | Public view docs |
| Auth | API key |
| Access | Self-serve: you can create API credentials |
| Zapier | Yes |
| Make | Yes |
| Webhooks | Yes |
| FirstVoice plan | Every plan |
| Checked | Against official Cal.com documentation, 17 September 2026 |
API key or OAuth; 120 req/min standard (intro); exact cal-api-version header per endpoint
Cal.com questions
Does FirstVoice work with Cal.com?
Yes. FirstVoice connects straight to Cal.com, checks your real free times and books the caller in during the call.
Do I have to change anything in Cal.com?
No. FirstVoice connects to your existing Cal.com account. You don't switch software, move data or retrain your team.
Which plan includes Cal.com?
Cal.com booking is included on every plan.
Cal.com is a trademark of its owner. FirstVoice isn't affiliated with Cal.com.
Using Cal.com? Let's connect it.
Free personalised demo in 24 hours · Free 2-week trial, set up by us · No credit card · Then from $297 a month