# ConvertChat — Demo gratuita with Frank Nillard

> Convierte tu WhatsApp Business en una máquina de ventas. Te enseño cómo: enviar promociones a toda tu lista de contactos, y dejar que la IA gestione todas las respuestas de tus leads. En 20 minutos verás una demo en directo con los datos de tu propio negocio. Sin compromiso.

- Host: Frank Nillard
- Duration: 20 min
- Location: Google Meet
- Host time zone: Europe/Madrid
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/architct/demo-cchat-es
- Event type id: 4508777

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=4508777&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": 4508777,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "attendeePhoneNumber": "…",
    "url": "…",
    "email-o-wa": "…"
  }
}
```

- Required fields: `name` (Tu Nombre), `attendeePhoneNumber` (Tu WhatsApp (por si te necesitamos contactar para la llamada)), `url` (Tu pagina web), `email-o-wa` (Tienes una lista de clientes en Email o WhatsApp?)
- 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.