# Paid Consultation with Donnie Berkholz Ph.D.

> Looking for a highly interactive advisory session with Donnie? You've found the right place! If you want an engaging, strategic deep dive that deconstructs, debates and delivers insights on your biggest challenges and opportunities, this is where you want to be. You can pick the date and time that works for you, and pay during checkout. No lock-in with a long-term agreement required! We've optimized this for your ability to quickly and easily get value, and add it to your next expense report. Details: Refer to the website for terms of use and privacy policy. Terms are non-negotiable because of the structure of this offering as a one-time consultation.

- Host: Donnie Berkholz Ph.D.
- Duration: 60 min
- Location: Google Meet
- Host time zone: America/Chicago
- Confirmation: Bookings are confirmed instantly.
- Payment: required, and collected on the booking page.
- Booking page: https://cal.com/platify-insights/consult
- Event type id: 272635

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=272635&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": 272635,
  "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)
- 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.