# Quality Lead Gen Strategy Call for UK Home Improvement Businesses with Utsav Daga

> For roofers, builders, kitchen and bathroom fitters, and other UK trades. In 20 minutes, I'll show you how we use Facebook and Instagram ads to get homeowners in your area calling you, already qualified and with confirmed budgets of £3k+

- Host: Utsav Daga
- Duration: 20, 30 min
- Location: Google Meet
- Host time zone: Europe/London
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/utsav-daga/20-minute-strategy-call
- Event type id: 1425033

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=1425033&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": 1425033,
  "start": "<UTC ISO 8601 start from the slots response>",
  "lengthInMinutes": 20,
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "prefill-1": "…",
    "prefill": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `prefill-1` (Contact Number), `prefill` (How much can you spend on advertising per month?)
- 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.
- `lengthInMinutes` picks one of 20, 30; pass the same value to the slots request as `duration`.