# 30 minuten Bitcoin Consult with Niek | Bitplanner

> Een kort gesprek om te verkennen hoe Bitcoin past bij jouw situatie. Kosteloos | Online | 30 minuten

- Host: Niek | Bitplanner
- Duration: 30 min
- Location: Cal Video
- Host time zone: Europe/Amsterdam
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/bitplanner/consult
- Event type id: 4261604

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=4261604&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

```http
POST https://api.cal.com/v2/bookings
cal-api-version: 2026-02-25
Content-Type: application/json

{
  "eventTypeId": 4261604,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "reason_bitcoin": "…",
    "own_bitcoin": "…",
    "stress_bitcoin": "…",
    "success_interview": "…",
    "attendeePhoneNumber": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `reason_bitcoin` (Wat is de belangrijkste reden dat je nú meer wilt weten over Bitcoin?), `own_bitcoin` (Bezit je op dit moment Bitcoin), `stress_bitcoin` (Wat vind je het spannendst aan Bitcoin?), `success_interview` (Wanneer zou dit gesprek voor jou geslaagd zijn?)
- Optional fields: `attendeePhoneNumber` (Phone number), `guests` (Add guests)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.