# OpenScale – Cal.com booking page

> OpenScale** is a growing startup providing software development and freelance IT services. We deliver scalable, efficient, and secure solutions tailored to business needs. From custom software to IT consulting, we help organizations streamline operations and drive digital growth.

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

## Event types

- [30 Min Meeting](https://cal.com/openscale/30min): 30 min, confirmed instantly, event type id 3375392. Details: https://cal.com/openscale/30min.md
- [15 Min Meeting](https://cal.com/openscale/15min): 15 min, confirmed instantly, event type id 3375391. Details: https://cal.com/openscale/15min.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