# 30 min meeting with Hasibul Hasan

> Consultation & Project Discussion A focused session to discuss your product, technical requirements, architecture, AI integration, SaaS development, or business goals in more detail. This meeting is ideal for: • SaaS product planning • MVP strategy and validation • System architecture reviews • AI implementation discussions • Technical consulting • Custom software development projects To make the most of our time, please provide relevant details about your project, goals, and any specific challenges you'd like to address.

- Host: Hasibul Hasan
- Duration: 30 min
- Location: Google Meet
- Host time zone: Asia/Dhaka
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/hasib/30min
- Event type id: 5800835

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5800835&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": 5800835,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "title": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `title` (What is this meeting about?)
- 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.