# Amber Coster – Cal.com booking page

> B2B Tech Fractional COO and Transformation Partner

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

## Event types

- [Assess in 30 mins](https://cal.com/ambercoster/30min): 30 min, confirmed instantly, event type id 6321960. A direct, no-pressure conversation about what's going on in your business to assess whether I'm the right person to help. Best for founders and CEOs of scaling B2B SaaS who've outgrown their operating model — you have to be everywhere, good ideas happen but rarely turn to outcomes, everything's feeling a bit... messy. We'll cover: what's holding things back, what "good" looks like, and the right next step. If I'm not the fit, I'll say so. No deck, no pitch. Bring the real problem. Details: https://cal.com/ambercoster/30min.md
- [Lean in 15](https://cal.com/ambercoster/15min): 15 min, confirmed instantly, event type id 6321959. Quick call. Big progress. Details: https://cal.com/ambercoster/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