# Free Website Demo Call with BrainSites

> On this quick call, we’ll show you a live demo of your new website made specifically for your business. You’ll see exactly how it looks, how it works, and how it can help you get more calls and customers. No obligation. If you like it, we can launch it for you right away. If not, no worries at all.

- Host: BrainSites
- Duration: 20 min
- Location: Zoom Video
- Host time zone: Europe/Sofia
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/brainsites/free-website-demo-call
- Event type id: 5152615

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5152615&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": 5152615,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "attendeePhoneNumber": "…",
    "Business-name": "…",
    "website": "…",
    "type-of-business": "…",
    "business-information": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `attendeePhoneNumber` (Phone number), `Business-name` (What is your business name?), `website` (Do you currently have a website? If yes, paste the link. If not, type NO.), `type-of-business` (What type of business do you run?), `business-information` (Tell us about your business so we can build your website demo (services, pricing, hours, service area, etc.))
- Optional fields: `notes` (Additional notes)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.