# Ferenc Erki – Cal.com booking page

> Turning digital waste into mission funds for Community Energy boards ⚡ Eco-efficient IT sovereignty advisor for Social & Solidarity Economy 🤝

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

## Event types

- [Rapid advice](https://cal.com/ferki/rapid): 50 min, requires the host’s confirmation, paid, event type id 183004. Under pressure to decide? Fast track to a no-nonsense expert take. Not worth it? Say so at the end for a full refund. Questions or concerns? Contact me. Details: https://cal.com/ferki/rapid.md
- [Discovery chat](https://cal.com/ferki/discovery): 30, 60 min, requires the host’s confirmation, event type id 160169. Bring your most pressing tech challenge – I bring my curiosity. Free of charge. No strings attached. No sales pitch. Details: https://cal.com/ferki/discovery.md
- [Open source office hours](https://cal.com/ferki/opensource): 30, 60, 90, 120, 180 min, requires the host’s confirmation, event type id 17639. Ask me anything about Rex, Gentoo, and anything else with my name on it. Ideal for pair programming and code review too. Also available on IRC and Matrix. Details: https://cal.com/ferki/opensource.md
- [Discussion](https://cal.com/ferki/discussion): 30, 60, 90, 120, 180 min, requires the host’s confirmation, event type id 17638. Request my presence for professional occasions such as general introduction, user interview, business lunch, speaking at an event, podcasts, and so on. Details: https://cal.com/ferki/discussion.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