# Discovery-Call with Marvin Kühlmann

> Dreißig Minuten, kostenlos, ohne Verkaufsgespräch. Du sagst was nervt — Postfach, Belege, Kalender-Pingpong, was auch immer. Ich sage was sich heute mit einem Agent automatisieren lässt und was nicht. Wenn's passt, machen wir Scoping. Wenn nicht, hast du eine zweite Meinung.

- Host: Marvin Kühlmann
- Duration: 30 min
- Location: Google Meet
- Host time zone: Europe/Berlin
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/agentic-ventures/discovery-call
- Event type id: 5496154

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5496154&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": 5496154,
  "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.