# Free 20-min call: How to get 10+ booked estimates this month with Sam

> 🌳 Losing jobs to whoever picked up the phone first? We fix that. 📅 In 20 mins we'll show you exactly how tree companies in your area are waking up to booked estimates every day — without chasing a single lead. No fluff. No pitch. Just show up and see if your area is available. 👇

- Host: Sam
- Duration: 20 min
- Location: Google Meet
- Host time zone: Asia/Katmandu
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/businessaudit/free-strategy-call-booked-estimates-for-tree-companies
- Event type id: 4896239

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=4896239&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": 4896239,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "attendeePhoneNumber": "…",
    "locationidentify": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `attendeePhoneNumber` (Phone number), `locationidentify` (Business Name)
- Optional fields: `notes` (Any Additional Notes Before we confirm the meeting?), `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.