# Vorgespräch with Carlo Müller-Hopp

> In diesem Gespräch prüfen wir schnell, ob eine Zusammenarbeit Sinn ergibt: 1. Ziel – Welche Wirkung soll das Projekt haben? 2. Budget – Passt Ihr finanzieller Rahmen zu unserem Leistungsumfang? 3. Entscheider:innen – Wer entscheidet final? 4. Timing – Welcher Zeitplan ist realistisch? Stimmen diese Eckdaten, folgt ein ausführliches Auftragsklärungsgespräch. Andernfalls geben wir klare Empfehlungen.

- Host: Carlo Müller-Hopp
- Duration: 15 min
- Location: Google Meet, Attendee phone number
- Host time zone: Europe/Berlin
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://honey.cal.eu/carlo/vorgespraech
- Event type id: 275964

## Check availability

```http
GET https://api.cal.eu/v2/slots?eventTypeId=275964&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.eu/v2/bookings
cal-api-version: 2026-02-25
Content-Type: application/json

{
  "eventTypeId": 275964,
  "start": "<UTC ISO 8601 start from the slots response>",
  "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.
- `location` is optional; without it the booking uses the event’s first location.