# Diagnostic Momentum with Yassine Kahia • Fondateur d'Artis Momentum

> Pendant 30 minutes, nous analysons ensemble votre performance commerciale, votre taux de transformation et les opportunités de chiffre d'affaires les plus immédiates. Vous repartez avec un diagnostic clair et des recommandations concrètes, que nous travaillions ensemble ou non.

- Host: Yassine Kahia • Fondateur d'Artis Momentum
- Duration: 30 min
- Location: Cal Video
- Host time zone: Europe/Paris
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/yassine-kahia-nybmll/diagnostic
- Event type id: 6131280

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=6131280&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": 6131280,
  "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.