# Kennismaking with kernn. | Lize D'haese

> Hi! Heel tof dat je even wil babbelen over jouw toekomstplannen. Ik ben alvast benieuwd waarmee ik je kan helpen. Vermeld dus zeker al je vragen en uitdagingen na het inplannen van je afspraak. Zo kan ik me alvast voorbereiden en kan de meeting efficiënt verlopen. PS: Wil je liever een ander momentje afspreken? Stuur dan een mailtje naar hi@kernn.be

- Host: kernn. | Lize D'haese
- Duration: 30 min
- Location: Google Meet, kernn. | Nitsemstraat 19, 3512 Stevoort, Koffietje in Hasselt
- Host time zone: Europe/Brussels
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/kernn/kennismaking
- Event type id: 4225388

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=4225388&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": 4225388,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "notes": "…",
    "attendeePhoneNumber": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `notes` (Additional notes)
- 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.
- `location` is optional; without it the booking uses the event’s first location.