# Intro call with Roman Kudin

> A quick 15-minute hello. Tell me who you are and what you are working on — we will see if it makes sense to go deeper.

- Host: Roman Kudin
- Duration: 15 min
- Location: Google Meet
- Host time zone: Europe/Athens
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/romirom11/intro
- Event type id: 7721717

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7721717&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": 7721717,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "notes": "…",
    "What-would-you-like-to-talk-about": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address)
- Optional fields: `notes` (Additional notes), `guests` (Add guests), `What-would-you-like-to-talk-about` (What would you like to talk about?)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.