# Telefonisch kennismaken with Rinnert Deelstra

> Laten we kennismaken en bespreken hoe we kunnen samenwerken. Vertel ons gerust vooraf waar uw interesse ligt. Wij bellen u op het opgegeven telefoonnummer.

- Host: Rinnert Deelstra
- Duration: 20 min
- Location: Attendee phone number
- Host time zone: Europe/Amsterdam
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/rinnert-deelstra-o0gtyi/kennismaken-telefonisch
- Event type id: 7725758

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7725758&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": 7725758,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "location": {
    "type": "attendeePhone",
    "phone": "…"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "Bedrijfsnaam": "…",
    "title": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (E-mailadres), `Bedrijfsnaam` (Bedrijfsnaam)
- Optional fields: `title` (Waarover wilt u het hebben?), `notes` (Aanvullende opmerkingen), `guests` (Gasten toevoegen)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.
- `location` is required: `location.phone` is the attendee’s own.