# Project Requirements Call with hakesh sundramoorthy

> A quick call to understand your product, goals, and the challenges you want to solve. We’ll go through your requirements, clarify the scope, and define the best approach for the design work. This helps ensure the project starts with clarity and aligned expectations.

- Host: hakesh sundramoorthy
- Duration: 30 min
- Location: Google Meet
- Host time zone: Asia/Kolkata
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/hakesh-sundramoorthy-xnlq7g/30min
- Event type id: 2863285

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=2863285&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": 2863285,
  "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.