# Technical deep-dive with Parth Tiwari

> A paid working session on one hard problem: AI pipeline or RAG design, evals and guardrails, GPU cost and latency, or an architecture and code review. Send the details ahead of time so we can go straight into it. Best once we've had an intro call.

- Host: Parth Tiwari
- Duration: 45 min
- Location: Cal Video
- Host time zone: Asia/Calcutta
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/parth-tiwari/technical-deep-dive
- Event type id: 6856099

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=6856099&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": 6856099,
  "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.