# 20-minute call with Mark P

> Book a 20-minute and add any notes or topics you'd like to cover so we can make the most of our time together. Need to schedule something outside these hours? Email me at hello@markparker.ca.

- Host: Mark P
- Duration: 20 min
- Location: Online meeting; link to follow.
- Host time zone: America/Edmonton
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/mark-p-kuujnf/20mincall
- Event type id: 7908130

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7908130&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": 7908130,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "location": {
    "type": "attendeeDefined",
    "location": "…"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "attendeePhoneNumber": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address)
- Optional fields: `attendeePhoneNumber` (Phone number), `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.
- `location` is required: `location.location` is the attendee’s own.