# Intro Call with André Sequeira

> About 45 minutes. A real conversation to understand where you are and whether we're a fit. I work with frontier and deep tech companies on the gap between what they've built and how it reads to the people who fund it, buy it, and use it. We'll dig into your product, your team, and what's making that harder than it should be right now. You'll leave knowing whether we're the right studio for where you are, and what working together would look like. Not a sales call. If we're not the right fit, I'll tell you. Come with the real problem.

- Host: André Sequeira
- Duration: 45 min
- Location: Google Meet
- Host time zone: Europe/Lisbon
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/mistaek/intro
- Event type id: 904801

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=904801&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": 904801,
  "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.