# 15-Minute Writing Check-In with Trevor with Trevor Martens

> Not sure what your next writing move is? In this free 15-minute call, we’ll talk about where you're at, where you want to go, and what might help you get there. Whether that includes the Write Things Community or not, you’ll leave with a clear, encouraging next step for your writing.

- Host: Trevor Martens
- Duration: 15 min
- Location: Zoom Video
- Host time zone: America/Winnipeg
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/trevormartens/15-min-next-step
- Event type id: 956514

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=956514&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": 956514,
  "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.