# Free UX Problem Call with Emil Ivanov

> Bring one UX problem from your product – a flow that's causing churn, a feature users aren't adopting, or a screen your team keeps debating. You'll leave with my honest read on it and what I'd do first. No pitch, no deck. If it makes sense to work together, we'll both know.

- Host: Emil Ivanov
- Duration: 30 min
- Location: Google Meet
- Host time zone: Europe/Sofia
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/emilivanov/ux-problem-call-30m
- Event type id: 6097577

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=6097577&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": 6097577,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "companyName": "…",
    "website": "…",
    "role": "…",
    "productStage": "…",
    "biggestChallenge": "…",
    "callValue": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address)
- Optional fields: `guests` (Add guests), `companyName` (Company Name), `website` (Website / Product Link), `role` (What’s your role?), `productStage` (What stage is your product at?), `biggestChallenge` (What’s your biggest product challenge right now?), `callValue` (What would make this call valuable for you?)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.