# Klein Petr – Cal.com booking page

> Solution Architect, Nuxter, Web3, Linux Enthusiast

Founder at Develit.io




https://kleinpetr.com/

Booking page: https://cal.com/kleinpetr

## Event types

- [Regular Meeting](https://cal.com/kleinpetr/30min): 60 min, requires the host’s confirmation, event type id 242356. Details: https://cal.com/kleinpetr/30min.md
- [Free consultation](https://cal.com/kleinpetr/coding-session): 30 min, requires the host’s confirmation, event type id 502235. Details: https://cal.com/kleinpetr/coding-session.md
- [Brainstorming](https://cal.com/kleinpetr/brainstorming): 45, 60, 90, 120 min, requires the host’s confirmation, event type id 502231. Details: https://cal.com/kleinpetr/brainstorming.md

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=<event type id>&start=YYYY-MM-DD&end=YYYY-MM-DD&timeZone=<IANA time zone>
cal-api-version: 2024-09-04
```

The response is `{"data":{"YYYY-MM-DD":[{"start":"<ISO 8601 with offset>"}]}}`; no API key is needed.

## Book

Each event type's `.md` document lists its required booking fields and the `POST https://api.cal.com/v2/bookings` request (`cal-api-version: 2026-02-25`).

## More

- API docs: https://cal.com/docs/api-reference/v2/introduction