# Spark AI Discovery (15 Min) with Spark OS

> This is a Spark OS discovery meeting

- Host: Spark OS
- Duration: 15 min
- Location: Google Meet
- Host time zone: America/New_York
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/spark-os-ai/30min
- Event type id: 4940438

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=4940438&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": 4940438,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "Company-Name": "…",
    "website": "…",
    "employee_count": "…",
    "locations": "…",
    "operations": "…",
    "tools": "…",
    "useai": "…",
    "revenue": "…",
    "timeline": "…",
    "attendeePhoneNumber": "…",
    "smsReminderNumber": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `Company-Name` (Company Name), `website` (Company Website (URL)), `employee_count` (How many employees does your company have?), `locations` (How many locations does your business operate?), `operations` (What operational areas are you looking to improve? (Select all that apply)), `tools` (What tools or systems do you currently us?), `useai` (Are you currently using any AI tools within your business?), `revenue` (Annual Revenue Range), `timeline` (Do you have a timeline for implementing an AI workforce?)
- Optional fields: `attendeePhoneNumber` (Phone number), `smsReminderNumber` (Phone number (Text notifications)), `notes` (Are there any additional topics we should review before our call?), `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.