# See your portal for free with Batdorj Atarbayasakh

> I'll build your custom crew portal based on the answers you provided. On the call, we'll go over it, plan how to tailor it to your needs even further and work together to find the best deal.

- Host: Batdorj Atarbayasakh
- Duration: 30 min
- Location: Cal Video
- Host time zone: Australia/Melbourne
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/aulis/30min
- Event type id: 6559506

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=6559506&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": 6559506,
  "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.