# Free Listing Optimization Call with Walter Romero

> On this call, I’ll take a look at your Airbnb listing and show you exactly what’s going on. We’ll go over: What’s hurting your bookings What’s working What you should fix first This is not a generic call. I’ll be looking at your actual listing and comparing it to others in your area so you can clearly see where you stand.

- Host: Walter Romero
- Duration: 45 min
- Location: Cal Video
- Host time zone: America/Denver
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/walter-romero/free-listing-optimization-call
- Event type id: 5522981

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5522981&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": 5522981,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "attendeePhoneNumber": "…",
    "notes": "…",
    "HostChallenges": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `attendeePhoneNumber` (Phone number), `notes` (Airbnb Listing URL), `HostChallenges` (Current Challenges as a Host)
- 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.