# Free 20-minute call with Hamed Derakhshan

> 20 minutes with Hamed Derakhshan, founder of Reeve. Bring your numbers or your worry: you'll leave with an honest read and one thing to do next. No pitch deck, and if we can't help, we'll say so.

- Host: Hamed Derakhshan
- Duration: 20 min
- Location: Cal Video
- Host time zone: America/Los_Angeles
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/reeve/free-call
- Event type id: 7780388

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7780388&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": 7780388,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "Store-or-brand-URL": "…",
    "Annual-revenue": "…",
    "Where-you-sell": "…",
    "What-worries-you-most-right-now": "…",
    "Optional--a-link-to-last-year-s-P-L--or-a-revenue-and-ad-spend-screenshot": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `Store-or-brand-URL` (Store or brand URL), `Annual-revenue` (Annual revenue), `Where-you-sell` (Where you sell), `What-worries-you-most-right-now` (What worries you most right now?)
- Optional fields: `guests` (Add guests), `Optional--a-link-to-last-year-s-P-L--or-a-revenue-and-ad-spend-screenshot` (Optional: a link to last year's P&L, or a revenue and ad-spend screenshot)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.