# chat with joseph @ startup ui with Joseph Zakher

> a 15 minute call with joseph about what you're building and who it's for. then a written quote with the scope, one fixed price, and target dates, or a launch blueprint to shape the scope first.

- Host: Joseph Zakher
- Duration: 15 min
- Location: Google Meet
- Host time zone: Asia/Tokyo
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/startupui/chat
- Event type id: 434888

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=434888&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": 434888,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "company": "…",
    "website": "…",
    "start": "…",
    "building": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `company` (company or product name)
- Optional fields: `website` (your current website, if you have one), `start` (where would you like to start?), `building` (what are you building?), `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.