# Rendez-vous de 30 min with B2TR • B2B • Digital • Innovation

> Premier échange avec votre interlocuteur projet dédié. Vous présentez votre besoin, votre contexte et vos contraintes. Sous 48 h, vous recevez un premier cadrage. 75 € HT (90 € TTC) Montant déduit de votre première facture.

- Host: B2TR • B2B • Digital • Innovation
- Duration: 30 min
- Location: Cal Video
- Host time zone: Europe/Paris
- Confirmation: Bookings are confirmed instantly.
- Payment: required, and collected on the booking page.
- Booking page: https://cal.com/b2tr-support-xpiutb/30min
- Event type id: 6958071

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=6958071&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": 6958071,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "objet": "…",
    "description-client-besoin-rdv": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `objet` (Votre demande concerne), `description-client-besoin-rdv` (Décrivez votre besoin en quelques mots.)
- Optional fields: none
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.