# Sienna Hayes – Cal.com booking page

> Sienna Hayes is a dedicated professional at Webtech On, specializing in digital marketing and online growth strategies. With expertise in SEO, content marketing, and backlink building, she helps businesses improve their online presence, boost search rankings, and achieve sustainable success in the competitive digital landscape.

Booking page: https://cal.com/sienna-hayes

## Event types

- [30 min meeting](https://cal.com/sienna-hayes/30min): 30 min, confirmed instantly, event type id 5504979. Details: https://cal.com/sienna-hayes/30min.md
- [15 min meeting](https://cal.com/sienna-hayes/15min): 15 min, confirmed instantly, event type id 5504978. Details: https://cal.com/sienna-hayes/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