# Build Session - AI Growth For Your Business with Ankur Shrivastava

> This call is for businesses, teams, and operators looking to grow their business with help of AI

- Host: Ankur Shrivastava
- Duration: 15, 30, 45 min
- Location: Google Meet
- Host time zone: Asia/Kolkata
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/ankurai/discovery
- Event type id: 5100803

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5100803&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": 5100803,
  "start": "<UTC ISO 8601 start from the slots response>",
  "lengthInMinutes": 30,
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "attendeePhoneNumber": "…",
    "company": "…",
    "role": "…",
    "teamsize": "…",
    "spend": "…",
    "objective": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `attendeePhoneNumber` (Phone number), `company` (What's your company name?), `role` (What's your role?), `teamsize` (How big is your team?), `spend` (How much do you spend on AI tools per month?), `objective` (What are you trying to build/fix?)
- Optional fields: `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.
- `lengthInMinutes` picks one of 15, 30, 45; pass the same value to the slots request as `duration`.