# One Hour Deep Dive with Billy

> If you have a specific issue or component of your business that requires more in-depth attention, this one hour session is the way to go. During this time, we'll thoroughly explore the topic at hand, discussing potential solutions, strategies, and action plans. Whether you need help with digital marketing, branding, process optimization, or any other aspect of your business, this session provides ample time to flesh out your ideas and receive comprehensive guidance.

- Host: Billy
- Duration: 60 min
- Location: Zoom Video
- Host time zone: America/Chicago
- Confirmation: Bookings are confirmed instantly.
- Payment: required, and collected on the booking page.
- Booking page: https://cal.com/askbilly/one-hour-deep-dive
- Event type id: 1957182

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=1957182&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": 1957182,
  "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), `notes` (Please provide a brief synopsis of what you would like to discuss or what I can help you with.)
- Optional fields: `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.