# Diagnostic session with Pavel Rogozhin

> Growth-tracking helps find the bottleneck for business growth, focus on it, and overcome it in order to accelerate the company’s growth rate. An idea and local traction worth nothing when you just decided to scale globally? It’s the execution and speed that count. That’s where we come in. We bring a full range of instruments to rapidly test, build, commercialise and scale your business. Book your diagnostic session

- Host: Pavel Rogozhin
- Duration: 60 min
- Location: Cal Video
- Host time zone: Asia/Nicosia
- Confirmation: The host confirms each booking; it stays pending until they accept it.
- Payment: required, and collected on the booking page.
- Booking page: https://cal.com/rogozhin/ds-gt
- Event type id: 841140

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=841140&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": 841140,
  "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), `notes` (Additional notes)
- Optional fields: `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.
- A successful response is a pending booking request.