# A short call with Mustafa with Mustafa Rana · Gecho

> 20 minutes on Google Meet with Mustafa, Gecho's co-founder. Tell us how calls, quotes and reviews work in your business today. We'll walk you through how Gecho Prôtos handles the missed call, the quote that goes quiet and the review you meant to ask for, and what it costs. If it's not a fit, we'll say so. Nothing to prepare. We use these details only to set up and follow up on this call, through our booking service.

- Host: Mustafa Rana · Gecho
- Duration: 20 min
- Location: Google Meet
- Host time zone: America/Vancouver
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/hello-gecho/short-call
- Event type id: 7722164

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7722164&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": 7722164,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "business-name": "…",
    "trade": "…",
    "city": "…",
    "phone": "…",
    "other-business": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email), `business-name` (Business name), `trade` (What kind of business?), `city` (City), `phone` (Best number to reach you)
- Optional fields: `other-business` (If other, what kind of business?), `notes` (Who picks up when you're on a job?)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.