# Zahidul Islam – Cal.com booking page

> A Security Researcher\\\\,\\\\ specializing in bug bounty, offensive security and automation. I help people secure their digital assets, fix technical issues, and simplify complex systems.

Booking page: https://cal.com/zahidoverflow

## Event types

- [30 Min Meeting](https://cal.com/zahidoverflow/30): 30 min, confirmed instantly, event type id 4034910. Details: https://cal.com/zahidoverflow/30.md
- [60 Min Meeting](https://cal.com/zahidoverflow/60): 60 min, confirmed instantly, event type id 4034911. Details: https://cal.com/zahidoverflow/60.md

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=<event type id>&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

Each event type's `.md` document lists its required booking fields and the `POST https://api.cal.com/v2/bookings` request (`cal-api-version: 2026-02-25`).

## More

- API docs: https://cal.com/docs/api-reference/v2/introduction