# Kurzgespräch mit Peter Rochel with Peter Rochel

> Lieber erst reden, über die Messung oder gleich über die Umsetzung? 15 Minuten mit Peter, kostenlos.

- Host: Peter Rochel
- Duration: 15 min
- Location: Zoom Video, Cal Video, MS Teams
- Host time zone: Europe/Berlin
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/peterrochel/kurzgespraech
- Event type id: 7539849

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7539849&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": 7539849,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "herkunft": "…",
    "empfohlen-von": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `herkunft` (Was hat den Anstoß für diesen Termin gegeben?)
- Optional fields: `empfohlen-von` (Falls Empfehlung oder etwas anderes: von wem bzw. wodurch?), `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.
- `location` is optional; without it the booking uses the event’s first location.