# Diagnostic gratuit — 1h with Tout est Faisable

> 1h, sur place (je me déplace) ou en visio. On repère ensemble ce qui vous fait perdre du temps ou ce qui vous coûte cher pour rien. Vous repartez avec un avis honnête et concret — sans aucun engagement.

- Host: Tout est Faisable
- Duration: 60 min
- Location: Cal Video
- Host time zone: Europe/Paris
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/toutestfaisable/diagnostic
- Event type id: 6013977

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=6013977&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": 6013977,
  "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.