# Napkin Demo with Napkin

> Hello! We’re excited that you’re interested in learning more about Napkin. During our demo, we’ll show you how Napkin can help you streamline communications with potential customers, create a seamless and beautiful experience that makes your business stand out, and offer a fully customizable catering checkout that integrates directly into your website.

- Host: Napkin
- Duration: 25 min
- Location: Cal Video
- Host time zone: America/New_York
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/napkin/napkin-demo
- Event type id: 1024176

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=1024176&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": 1024176,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "phone": "…",
    "restaurant": "…",
    "quantity": "…",
    "notes": "…",
    "referral": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `phone` (What is your phone number?), `restaurant` (What is the name of your restaurant?), `quantity` (On average, roughly how many catering orders do you get a month?)
- Optional fields: `notes` (Any more context you'd like to share about your business?), `referral` (How did you hear about us?)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.