# Carbon Onboarding - 15 Min Meeting with Derek Tu

> Hiya, I'm Derek, the CEO/Co-Founder of Carbon. I'd love the chance to onboard you myself and it'll take less than 15 minutes. During that time, I'll provision your account, guide you through our documentation, and answer any questions you might have. :)

- Host: Derek Tu
- Duration: 15 min
- Location: Zoom Video
- Host time zone: America/Los_Angeles
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/carbon-ai/15min
- Event type id: 295849

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=295849&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": 295849,
  "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.