# Jona Schaeffer – Cal.com booking page

> Founder & CEO hallo theo

Booking page: https://hallo-theo.cal.eu/jona

## Event types

- [Videocall w/ Jona](https://hallo-theo.cal.eu/jona/videocall-w-jona): 30 min, confirmed instantly, event type id 232864. Details: https://hallo-theo.cal.eu/jona/videocall-w-jona.md
- [Quick chat w/ Jona](https://hallo-theo.cal.eu/jona/quick-chat-w-jona): 15 min, confirmed instantly, event type id 232863. Details: https://hallo-theo.cal.eu/jona/quick-chat-w-jona.md
- [Coffee Chat w/ Jona](https://hallo-theo.cal.eu/jona/coffee-chat-w-jona): 45 min, confirmed instantly, event type id 232862. Details: https://hallo-theo.cal.eu/jona/coffee-chat-w-jona.md

## Check availability

```http
GET https://api.cal.eu/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.eu/v2/bookings` request (`cal-api-version: 2026-02-25`).

## More

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