# Intro Call with Nishant Singh

> A brief 20–30 minute call to get to know each other, walk through my current project idea, and explore potential collaboration. I’ll share the vision, current validation progress, influencer support, and the kind of developers I’m looking to team up with. The goal is to see if there’s a strong mutual fit before diving deeper. Excited to connect and see where this goes!

- Host: Nishant Singh
- Duration: 20 min
- Location: Cal Video, Google Meet, Discord
- Host time zone: Asia/Kolkata
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/nishantsingh211/intro-call
- Event type id: 2477591

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=2477591&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": 2477591,
  "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.
- `location` is optional; without it the booking uses the event’s first location.