# 30-Minute Discovery Session with TIER 321 LLC

> A focused conversation about how a TIER 321 product could fit your needs, or about a potential partnership. We will discuss your goals, relevant product capabilities, current limitations, availability, and possible next steps. Please include the product or topic you want to discuss when booking. TIER 321 LLC is a Virginia-based AI and software product company. Current products and availability: https://tier321.com/products

- Host: TIER 321 LLC
- Duration: 30 min
- Location: Google Meet
- Host time zone: America/New_York
- Confirmation: The host confirms each booking; it stays pending until they accept it.
- Booking page: https://cal.com/tier321/30min
- Event type id: 5298465

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5298465&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": 5298465,
  "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.
- A successful response is a pending booking request.