# Time Master discussion ⏳ with Alex Komarov

> Hi! This is Alex and Misha. Thank you for meeting with us. We would like to get your feedback on the app, and learn more about how we can make it better for you and people like you.

- Host: Alex Komarov
- Duration: 30 min
- Location: Google Meet
- Host time zone: Asia/Makassar
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/alex-k/time-master
- Event type id: 937121

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=937121&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": 937121,
  "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.