# 15 min Demo with Nabeeha Ali

> Customers call 2–3 businesses and go with whoever answers first. In 15 minutes, I’ll show you how to answer every call, day or night, and book more appointments, without hiring extra staff.

- Host: Nabeeha Ali
- Duration: 15 min
- Location: Google Meet
- Host time zone: Asia/Karachi
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/tidewellops/demo
- Event type id: 7821263

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7821263&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": 7821263,
  "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.