# LabWired — Firmware Problem Review with Andrii Shylenko

> Bring a firmware problem that is slowing down your team. In this free 30-minute call, we will discuss the symptoms, the device and interfaces involved, what you have tried, and practical next steps. No source code or confidential files are needed for the first conversation. If there is a fit, we will agree on a scope and quote before any further work.

- Host: Andrii Shylenko
- Duration: 30 min
- Location: Google Meet
- Host time zone: Europe/Budapest
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/andriishylenko/30min
- Event type id: 628456

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=628456&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": 628456,
  "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.