# Founder Hour with Milosz Falinski

> Every Wednesday, I'm setting aside time for founders who could use a thinking partner. No agenda, no sales pitch - just the kind of conversation I wish I could have had more of when building Lumi. Recent conversations: "This agency proposal looks great, but something feels off..." "Our conversion rate hasn't moved after the redesign. What happened?" "Should we build this feature or focus on marketing?" "How do you know when it's time to pivot messaging?" Sometimes you just need someone who's wrestled with similar decisions to help you think it through. I find these chats helpful too - every startup teaches me something new. Free hour, honest feedback.

- Host: Milosz Falinski
- Duration: 60 min
- Location: Google Meet
- Host time zone: Europe/London
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/milosz-falinski/founder-hour
- Event type id: 4577438

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=4577438&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": 4577438,
  "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.