# Free AI Visibility Scan + Demo with Nathan Hall

> A free, no-cost look at how AI assistants like ChatGPT, Claude, and Perplexity see your business right now. We run a live scan, show you whether AI knows you and whether it picks you, and walk you through exactly where you stand and what is possible. No pitch, just your real picture.

- Host: Nathan Hall
- Duration: 90 min
- Location: Google Meet
- Host time zone: America/Chicago
- Confirmation: The host confirms each booking; it stays pending until they accept it.
- Booking page: https://cal.com/nathanhall-lefty/working-session
- Event type id: 5933924

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5933924&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": 5933924,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "Company-or-website": "…",
    "Work-email--at-your-company-s-domain": "…",
    "Your-role-at-the-company": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `Company-or-website` (Company or website), `Work-email--at-your-company-s-domain` (Work email (at your company's domain)), `Your-role-at-the-company` (Your role at the company)
- 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.
- A successful response is a pending booking request.