# Appel Diagnostic with Manuel Coffin

> Cet appel de 30 minutes permet de discuter de votre projet pour : Comprendre votre idée et vos objectifs Identifier les défis techniques et les solutions possibles Évaluer la faisabilité et voir si nous pouvons travailler ensemble L’objectif est de clarifier les prochaines étapes et d’éviter les erreurs courantes pour un lancement rapide et efficace.

- Host: Manuel Coffin
- Duration: 30 min
- Location: Link meeting
- Host time zone: Europe/Paris
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/manuel-coffin/30min
- Event type id: 163366

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=163366&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": 163366,
  "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` (Pour mieux préparer notre échange), `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.