# Introduction with Bartek

> Explore partnership: On the call we'll cover: - Formal introductions - Your aspirations - Our process overview See you there.

- Host: Bartek
- Duration: 15 min
- Location: Google Meet
- Host time zone: Europe/London
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/bartek-marzec/30min
- Event type id: 2809377

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=2809377&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": 2809377,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "attendeePhoneNumber": "…",
    "Budget": "…",
    "Type": "…",
    "Purpose": "…",
    "Services": "…",
    "Success": "…",
    "Timeline": "…",
    "Team": "…",
    "Find": "…",
    "web-app": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `attendeePhoneNumber` (Phone number), `Budget` (Budget commitment:), `Type` (Project stage:), `Purpose` (What is the purpose of your enquiry?), `Services` (What services are you interested in?), `Success` (What does success look like in 3 months?), `Timeline` (What's your timeline?), `Team` (Have you worked with a designer or agency before?), `Find` (How did you find me?)
- Optional fields: `web-app` (Link your current web/app), `notes` (Additional notes)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.