# Free 15-Minute Project Discovery Call with Coder Bytes

> Book a quick 15-minute call with our team to discuss your project idea, business requirements, current challenges, and the best possible software solution. We’ll understand your goals, answer your initial questions, and guide you on the next practical steps.

- Host: Coder Bytes
- Duration: 15 min
- Location: Google Meet
- Host time zone: Asia/Karachi
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/coder-bytes-studio/15min
- Event type id: 6235418

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=6235418&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": 6235418,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address)
- 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.