# 25 min meeting with Peter Barca

> Twenty five minutes. Tell us where the firm is spending its time, and we’ll tell you honestly what AI can and can’t do about it, including when the answer is “not much, yet.”

- Host: Peter Barca
- Duration: 25, 30 min
- Location: Cal Video
- Host time zone: America/New_York
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/peter-barca/25min
- Event type id: 7190386

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7190386&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": 7190386,
  "start": "<UTC ISO 8601 start from the slots response>",
  "lengthInMinutes": 25,
  "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.
- `lengthInMinutes` picks one of 25, 30; pass the same value to the slots request as `duration`.