# Spanish OS Strategy Session with Kai Cerar

> Walk away with a clear roadmap to Spanish fluency that actually fits your schedule, profession and how your brain is supposed to learn.

- Host: Kai Cerar
- Duration: 30 min
- Location: Zoom Video
- Host time zone: Europe/Istanbul
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/kai-cerar-nbtbha/spanishos
- Event type id: 4153202

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=4153202&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": 4153202,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "attendeePhoneNumber": "…",
    "Kai": "…",
    "Kai1": "…",
    "Kai2": "…",
    "Last-Question----What-is-your-bigger-vision-or-goal-with-Spanish---No-vague-answers": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `attendeePhoneNumber` (Phone number), `Kai` (What’s been your biggest challenge with learning Spanish?), `Kai1` (What is your occupation?), `Kai2` (Where does learning Spanish rank in your life?), `Last-Question----What-is-your-bigger-vision-or-goal-with-Spanish---No-vague-answers` (Last Question... What is your bigger vision or goal with Spanish? (No vague answers))
- Optional fields: none
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.