# Besprechung with Jan-Lukas Knoch

> Hier können Sie einen Beratungstermin buchen, der nach Zeitaufwand abgerechnet wird. Es wird nur der tatsächliche Zeitaufwand berechnet, nicht das gebuchte Zeitfenster. Nicht berechnet werden Termine, bei denen es sich um einen Termin der Angebotsbesprechung handelt und für pauschal abgerechnete Leistungen.

- Host: Jan-Lukas Knoch
- Duration: 15, 30, 45, 60 min
- Location: Cal Video
- Host time zone: Europe/Berlin
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/jlknoch/besprechung-30-minuten
- Event type id: 671346

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=671346&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": 671346,
  "start": "<UTC ISO 8601 start from the slots response>",
  "lengthInMinutes": 30,
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address)
- Optional fields: `notes` (Additional notes), `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.
- `lengthInMinutes` picks one of 15, 30, 45, 60; pass the same value to the slots request as `duration`.