# Book a 15-Minute Discovery Call! with Nilanjan Ghosh Roy

> If you're seeking expert product advice or need assistance with idea validation, I'm here to offer my expertise and support. As a dedicated Product UX/UI Designer, I specialize in creating sustainable digital products that not only align with your business goals but also ensure your customers are delighted with their experiences. I'm here to assist you in understanding and help elevate your brand.

- Host: Nilanjan Ghosh Roy
- Duration: 15 min
- Location: Google Meet
- Host time zone: Asia/Calcutta
- Confirmation: The host confirms each booking; it stays pending until they accept it.
- Booking page: https://cal.com/textnilanjan/15min
- Event type id: 461470

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=461470&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": 461470,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "title": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `title` (What is this meeting about?)
- 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.
- A successful response is a pending booking request.