# Tecna | eCom Growth Chat with Ezequiel Costales

> Quick chat with Tecna's founder, Ezequiel Costales, a Fortune 500 engineer and consultant. With almost a decade in the technology space, I have provided consultation services for global brands like Shopify, Asics, Mattel, Olaplex, Kimberly-Clark, American Express, PepsiCo, Mitsubishi, Travelers Insurance, and many more world-class brands. The goal of this session is to surface bottlenecks and opportunities to keep growing your eCom through our CRO lens.

- Host: Ezequiel Costales
- Duration: 25 min
- Location: Google Meet
- Host time zone: America/Argentina/Buenos_Aires
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/ezequiel-c/tecna-ecom-quick-chat
- Event type id: 5408703

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5408703&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": 5408703,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "website": "…",
    "mktspend": "…",
    "problem": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `website` (Website link), `mktspend` (What's your monthly Marketing investment? (USD))
- Optional fields: `problem` (What's the #1 problem you're looking to solve?), `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.