# 15-min HVAC AI Audit with Nicholas Carlson

> Essentially just a 15-minute call where we show you exactly how other businesses in your industry are currently using AI —where it’s working, where it’s not, and if it even makes sense for you.

- Host: Nicholas Carlson
- Duration: 15 min
- Location: Cal Video
- Host time zone: America/New_York
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://dot-connectors-llc.cal.com/nicholas/15-min-ai-a
- Event type id: 5834553

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5834553&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": 5834553,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "attendeePhoneNumber": "…",
    "Company": "…",
    "Lead_Source": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `attendeePhoneNumber` (Phone number), `Company` (Company), `Lead_Source` (Where did you hear about us?)
- 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.