# Level & True with Benjamin Wirtz

> The free Risk Review call: How bad could it get? What are the major risks? What are my options? One free call. Three straight answers.

- Host: Benjamin Wirtz
- Duration: 20 min
- Location: Google Meet
- Host time zone: Australia/Sydney
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/benfwirtz/levelandtrue
- Event type id: 7055228

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7055228&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": 7055228,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "attendeePhoneNumber": "…",
    "State": "…",
    "Stage": "…",
    "main-worry": "…",
    "Site-address": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `attendeePhoneNumber` (Phone number), `State` (State), `Stage` (Stage), `main-worry` (What is your main worry right now?)
- Optional fields: `Site-address` (Site address), `notes` (What concerns brought you to us?), `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.