# Kostenfreies Erstgespräch (20 Min.) with Leadgewinn - Malvin Pinter

> Kurzes Kennenlernen, in dem wir Ihnen zeigen, wo für Ihren Betrieb mehr Aufträge möglich sind. Sie müssen nichts vorbereiten, einfach zuhören und mitnehmen, was für Sie drin ist. Rund 20 Minuten.

- Host: Leadgewinn - Malvin Pinter
- Duration: 20 min
- Location: Attendee phone number
- Host time zone: Europe/Berlin
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/leadgewinn/erstgespraech
- Event type id: 5874707

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5874707&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": 5874707,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "location": {
    "type": "attendeePhone",
    "phone": "…"
  },
  "guests": [
    "guest@example.com"
  ]
}
```

- Required fields: `name` (Your name), `email` (Email address)
- Optional fields: `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 required: `location.phone` is the attendee’s own.