# dolfyn discovery call (15 min) with dolfyn Team

> dolfyn builds custom AI receptionists and automations for businesses that run on calls. On this call we'll ask how calls reach you today and how your current system is set up. If it's a fit, we'll build a demo on your business and walk you through it.

- Host: dolfyn Team
- Duration: 15 min
- Location: Zoom Video
- Host time zone: America/Vancouver
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/dolfyn/15min
- Event type id: 3592844

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=3592844&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": 3592844,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "notes": "…",
    "heard_from": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address)
- Optional fields: `notes` (Additional notes), `guests` (Add guests), `heard_from` (How did you hear about us?)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.