# Idea + Setup Session with Ryan Colgin

> Turn your idea into a buildable plan. We’ll work through what you want to make, who it’s for, the smallest useful version, the right approach and tools, major unknowns, and what to build first. You’ll leave with a clear MVP direction, recommended setup, and a Build Brief you can use to keep building with me or continue on your own.

- Host: Ryan Colgin
- Duration: 90 min
- Location: Cal Video
- Host time zone: America/Chicago
- Confirmation: Bookings are confirmed instantly.
- Payment: required, and collected on the booking page.
- Booking page: https://cal.com/ryan-colgin/idea-setup-session
- Event type id: 6946345

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=6946345&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": 6946345,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "What-do-you-want-to-build": "…",
    "Who-is-it-for": "…",
    "What-would-make-this-session-useful-for-you": "…",
    "smsReminderNumber": "…",
    "What-do-you-already-have--if-anything": "…",
    "Link-to-anything-relevant": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `What-do-you-want-to-build` (What do you want to build?), `Who-is-it-for` (Who is it for?), `What-would-make-this-session-useful-for-you` (What would make this session useful for you?)
- Optional fields: `smsReminderNumber` (Phone number (Text notifications)), `What-do-you-already-have--if-anything` (What do you already have, if anything?), `Link-to-anything-relevant` (Link to anything relevant), `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.