# Marten Lohstroh – Cal.com booking page

> Co-founder and CEO of Xronos Inc.

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

## Event types

- [Meet In-person](https://cal.com/xronos/in-person): 60 min, confirmed instantly, event type id 5394850. Details: https://cal.com/xronos/in-person.md
- [Google Meet](https://cal.com/xronos/remote): 15, 30, 45, 60 min, confirmed instantly, event type id 5394849. Details: https://cal.com/xronos/remote.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