# Discovery Call with Article Four

> A 45-minute conversation about your Article 4 obligations and which workshop format fits your team. We'll cover your current AI tools and rollout, what an audit-ready outcome looks like for your company, and which package — Quick, Practical, or Comprehensive Compliance — is the right starting point. No prep needed, no commitment, no slides. Free.

- Host: Article Four
- Duration: 45 min
- Location: Cal Video
- Host time zone: Europe/Berlin
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.eu/articlefour/discovery
- Event type id: 284540

## Check availability

```http
GET https://api.cal.eu/v2/slots?eventTypeId=284540&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.eu/v2/bookings
cal-api-version: 2026-02-25
Content-Type: application/json

{
  "eventTypeId": 284540,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "Company-Name": "…",
    "Headcount": "…",
    "country": "…",
    "package": "…",
    "role": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `Company-Name` (Company Name), `Headcount` (Company Headcount), `country` (Country / Location), `package` (Which package(s) interest you?)
- Optional fields: `role` (Your Role), `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.