# 15 Minutes Complimentary Call with Victor Koh

> The purpose of the Complimentary Call is to get a sense of whether we are suitable to journey together. Expectations and values alignment are important to ensure our journey is an enjoyable one. Are we meant to journey together? We'll find out during the call! See you!

- Host: Victor Koh
- Duration: 15 min
- Location: [15 Minutes] Complimentary Call
- Host time zone: Asia/Singapore
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/victor-koh/15-minutes-complimentary-call
- Event type id: 3157388

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=3157388&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": 3157388,
  "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.