# Initial needs analysis with documentation with Robert Brendler

> We talk for 90 minutes by video about your processes and bottlenecks. Within five working days you receive two to three pages of documentation: starting point, requirements, scope and the order to build things in, with a rough estimate. For associations and businesses. The price is credited against a follow-up order.

- Host: Robert Brendler
- Duration: 90 min
- Location: Google Meet
- Host time zone: Europe/Rome
- Confirmation: Bookings are confirmed instantly.
- Payment: required, and collected on the booking page.
- Booking page: https://cal.com/brendler/needs-analysis
- Event type id: 7328619

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7328619&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": 7328619,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "ab": "…",
    "wr": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `ab` (What is this about roughly?), `wr` (I am commissioning this service and agree that it begins before the withdrawal period ends. I understand that my right of withdrawal expires once the service has been fully performed.)
- Optional fields: `guests` (Add guests), `notes` (Additional notes)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.