# 15 Min Demo with Dr. Andrey Esaulov (CEO of BotTalk)

- Host: Dr. Andrey Esaulov (CEO of BotTalk)
- Duration: 15 min
- Location: Zoom Video
- Host time zone: Europe/Zurich
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/bottalk/15min
- Event type id: 4128483

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=4128483&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": 4128483,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "Company-Name": "…",
    "Company-Website": "…",
    "One-sentence-description-of-your-business": "…",
    "Number-of-articles-you-publish-monthly": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `Company-Name` (Company Name), `Company-Website` (Company Website), `One-sentence-description-of-your-business` (One sentence description of your business), `Number-of-articles-you-publish-monthly` (Number of articles you publish monthly)
- Optional fields: `guests` (Add guests), `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.