# Intro call with Alexander Donskoy with Avante Team

> A short call with Alexander Donskoy, Sales Director at Avante. Tell us what you are launching or replacing. We'll go through your current stack and timeline, and tell you plainly whether Avante is a fit.

- Host: Avante Team
- Duration: 30 min
- Location: Zoom Video
- Host time zone: Asia/Nicosia
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.eu/avantebss/alex-intro
- Event type id: 396611

## Check availability

```http
GET https://api.cal.eu/v2/slots?eventTypeId=396611&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": 396611,
  "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.