# Derek Granger – Cal.com booking page

> Hi, I’m Derek - founder of Aris Growth.**


I help accountancy firms and technology companies turn partnerships into real client wins.


If you're exploring a new partnership, entering the accountancy market, or trying to make an existing one work better, feel free to grab a slot and we can chat.

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

## Event types

- [Finance Function Review](https://cal.com/derekgranger/finance-function-review): 30 min, confirmed instantly, event type id 6943445. A chance to explore your options and get expert feedback on how your finance support can move your business forward. Details: https://cal.com/derekgranger/finance-function-review.md
- [Quick Chat](https://cal.com/derekgranger/quick-chat): 15 min, confirmed instantly, event type id 990506. Use this to book a quick 15 minute call with me. Details: https://cal.com/derekgranger/quick-chat.md
- [Intro/Catch Up Call](https://cal.com/derekgranger/catch-up-call): 30 min, confirmed instantly, event type id 1411394. Use this to book a 30 minute intro or catch up call with me. Details: https://cal.com/derekgranger/catch-up-call.md
- [A little bit of a longer chat](https://cal.com/derekgranger/a-little-bit-of-a-longer-chat): 45 min, confirmed instantly, event type id 1810928. 45 minute meeting - For when 30 mins just isn't enough, but an hour is a bit too much Details: https://cal.com/derekgranger/a-little-bit-of-a-longer-chat.md
- [Longer Convo - 60 mins](https://cal.com/derekgranger/longer-convo-60-mins): 60 min, confirmed instantly, event type id 994427. Use this to book a longer meeting with me. Details: https://cal.com/derekgranger/longer-convo-60-mins.md
- [In Person Meeting](https://cal.com/derekgranger/in-person-meeting): 60 min, confirmed instantly, event type id 1955499. If you want to meet in the real word, feel free to book a slot here. Just let me know where you want to meet. Details: https://cal.com/derekgranger/in-person-meeting.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