# GrowthOS Intro Call with Amy Wilkinson

> A free 20 minutes, no prep and no pitch. Tell me where you are and what you're trying to grow, and I'll give you a straight read on whether systems would actually compound your growth, and where I'd start. If we're a fit, we'll talk about working together. If not, I'll say so and point you where I'd look instead. In the 20 minutes: - Where you are now, and what you're actually trying to grow - The one or two places systems would compound fastest for you - Whether the Growth Diagnostic, a full build, or neither is your next step - A clear next step if there's a fit, an honest no if there isn't

- Host: Amy Wilkinson
- Duration: 20 min
- Location: Cal Video
- Host time zone: Europe/Amsterdam
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/amy-wilkinson/growthos-intro-call
- Event type id: 6170718

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=6170718&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": 6170718,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "Website": "…",
    "source": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `Website` (Website), `source` (How did you find 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.