# Discovery Call with Arnob Mukherjee

> Tell us what you’re building and where you want to take it. In 30 minutes, we’ll explore your product, understand your priorities, and see how Lumenridge can help your team design, build, and ship. Bring a challenge, an idea, or a product ready for its next chapter.

- Host: Arnob Mukherjee
- Duration: 30 min
- Location: Cal Video
- Host time zone: Asia/Kolkata
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/lumenridge/30min
- Event type id: 7329050

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7329050&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": 7329050,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "Your-role": "…",
    "What-stage-is-your-company-at": "…",
    "How-is-product-design-handled-today": "…",
    "What-kind-of-support-are-you-looking-for": "…",
    "What-s-your-current-annual-revenue-or-ARR": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `Your-role` (Your role), `What-stage-is-your-company-at` (What stage is your company at?), `How-is-product-design-handled-today` (How is product design handled today?), `What-kind-of-support-are-you-looking-for` (What kind of support are you looking for? -)
- Optional fields: `What-s-your-current-annual-revenue-or-ARR` (What’s your current annual revenue or ARR?), `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.