# Katie Williams – Cal.com booking page

> Hi! I'm Dr. Williams, a registered perinatologist. I am a trained OBGYN from Stanford Medicine, and completed my High-Risk Maternal Fetal Medicine Fellowship from Yale. I'm excited to help high-risk patients have healthier pregnancies!

\[THIS IS AN EXAMPLE MEETING FROM THE DEMO. THERE WILL BE NO ACTUAL MEETING AND YOU ARE FREE TO REMOVE THIS FROM YOUR CALENDAR\].

Booking page: https://elythea.cal.com/info

## Event types

- [30 Min Meeting](https://elythea.cal.com/info/30min): 30 min, confirmed instantly, event type id 823145. Hi! I'm Dr. Williams, a registered perinatologist. I will meet with you for 30 minutes to review your risk factors and help provide you with the best preventive medication, diet, and resources to help you have a healthy baby! Our meeting is fully encrypted, HIPAA compliant, and confidential. [THIS IS AN EXAMPLE MEETING FROM THE DEMO. THERE WILL BE NO ACTUAL MEETING AND YOU ARE FREE TO REMOVE THIS FROM YOUR CALENDAR]. Details: https://elythea.cal.com/info/30min.md
- [15 Min Meeting](https://elythea.cal.com/info/15min): 15 min, confirmed instantly, event type id 823144. Details: https://elythea.cal.com/info/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