# Your First Session with Hannes with Hannes · Vivid German

> 50 minutes of German on Zoom, just you and me. We use pictures, gestures and little stories, and you'll understand more than you expect. No preparation needed, just come as you are. At the end we talk about how you'd like to go on.

- Host: Hannes · Vivid German
- Duration: 50 min
- Location: Zoom Video
- Host time zone: America/Argentina/Cordoba
- Confirmation: Bookings are confirmed instantly.
- Payment: required, and collected on the booking page.
- Booking page: https://cal.com/vividgerman/first-lesson
- Event type id: 7775591

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7775591&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": 7775591,
  "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.