# Book a 20 min intro call with Gytis with Gytis Markevicius

- Host: Gytis Markevicius
- Duration: 20 min
- Location: Google Meet
- Host time zone: Europe/Vilnius
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/gytismark/20min
- Event type id: 6144637

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=6144637&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": 6144637,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "What-type-of-product-are-you-building": "…",
    "Are-you-the-person-responsible-for-approving-design-partnerships-and-budget-decisions": "…",
    "Are-you-comfortable-with-a-minimum-2-month-engagement-starting-at--8k-month": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `What-type-of-product-are-you-building` (What type of product are you building?), `Are-you-the-person-responsible-for-approving-design-partnerships-and-budget-decisions` (Are you the person responsible for approving design partnerships and budget decisions?), `Are-you-comfortable-with-a-minimum-2-month-engagement-starting-at--8k-month` (Are you comfortable with a minimum 2-month engagement starting at $8k/month?)
- Optional fields: `notes` (Anything else you want to add before our call?)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.