# Erstgespräch Website oder 3D-Rundgang with KO Performance

> 30 Minuten per Video über Google Meet, im Browser ohne Installation. Es geht um den Betrieb und darum, was die Website oder der 3D-Rundgang leisten soll. Danach ist klar, wie wir vorgehen würden und mit welchen Kosten zu rechnen ist. Das Gespräch ist kostenlos.

- Host: KO Performance
- Duration: 30 min
- Location: Google Meet
- Host time zone: Europe/Berlin
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/ko-performance/erstgespraech
- Event type id: 7583793

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7583793&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": 7583793,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "attendeePhoneNumber": "…",
    "thema": "…",
    "betrieb": "…",
    "notes": "…",
    "website": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `attendeePhoneNumber` (Phone number), `thema` (Worum geht es?), `betrieb` (Name und Ort des Betriebs)
- Optional fields: `notes` (Additional notes), `guests` (Add guests), `website` (Aktuelle Website, falls vorhanden)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.