# Conference Talk — Scoping Call with Marcel R. G. Berger

> Free 30-minute scoping call for a conference talk, internal company event, or meetup. Topics I speak on: • AI in software development • App development — native Apple and cross-platform • Building scalable Kubernetes systems solo • Indie development and running a solo software business • Open to suggestion What I build: marcelrgberger.com Book: Solopreneur — The Art of Working Alone This call is for scoping the talk: format, audience, length, date, logistics. The actual talk is delivered as a separate engagement. — Honorarium: €2.000 net per delivered talk. Invoice issued after the talk. Travel, accommodation, and meals are arranged and paid by the booking organization. The 30-minute scoping call itself is free. Invoiced by DigitalFreedom Global LLC (Wyoming, USA). Prices exclude tax. Business customers in the EU account for VAT under the reverse-charge procedure. Any other local tax is the customer's responsibility. Imprint · Privacy

- Host: Marcel R. G. Berger
- Duration: 30 min
- Location: MS Teams
- Host time zone: Europe/Berlin
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/marcelrgberger/conference-talk
- Event type id: 5722022

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5722022&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": 5722022,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "organization-type": "…",
    "organization-name": "…",
    "event-date": "…",
    "event-location": "…",
    "audience-size": "…",
    "topic": "…",
    "details": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `organization-type` (Organization type), `organization-name` (Organization / event name), `event-date` (Planned date (or window)), `event-location` (Location (city, country) — or remote), `audience-size` (Expected audience size), `topic` (Preferred topic)
- Optional fields: `details` (Anything else I should know upfront?), `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.