# 1-on-1 'Double Your Booked Calls' Session with Lucas Hogendoorn

> This 45-minute call is to determine if we can install our proven client acquisition system directly into your business. This process has led to results like... Josh from GSAFocus not only booking 60% more calls but TRIPLING his close rate... And helped Marcos from The Birdhouse add a stream of high-level clients to his $250k/month agency. If you're ready to see what our 4-VSL + 18-follow-up system can achieve in your business, select a time below.

- Host: Lucas Hogendoorn
- Duration: 45 min
- Location: Google Meet
- Host time zone: Europe/Amsterdam
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/lucashogendoorn/funnel
- Event type id: 3290636

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=3290636&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": 3290636,
  "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.