# 전화 상담 (15분) with 빌드업웍스

> 선택하신 시간에 빌드업웍스에서 전화드립니다. 고객님이 전화하실 필요 없습니다.

- Host: 빌드업웍스
- Duration: 15 min
- Location: Google Meet
- Host time zone: Asia/Seoul
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/buildupworks/call-15
- Event type id: 5080871

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5080871&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": 5080871,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "attendeePhoneNumber": "…",
    "Company": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `attendeePhoneNumber` (Phone number)
- Optional fields: `Company` (회사명), `notes` (Additional notes)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.