# book-a-demo with Ryven Global LLC

> Hey there, Thanks for showing interest in our products. We promise to make amazing products and customized solutions for your business. Love to see you in the call. Feel free to book a call. We will be right in touch with you as soon as you book the call. Thanks again!

- Host: Ryven Global LLC
- Duration: 30 min
- Location: Google Meet
- Host time zone: Asia/Dhaka
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/ryven/book-a-demo
- Event type id: 3919521

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=3919521&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": 3919521,
  "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.