# Echosyst Studio Call with Echosyst Studio

> Tell us about your brand and what you need, posts, videos or both. We’ll tell you honestly where to start, even if it’s small.

- Host: Echosyst Studio
- Duration: 30 min
- Location: Zoom Video
- Host time zone: Asia/Dhaka
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/echosyst/studio
- Event type id: 7642232

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7642232&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": 7642232,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "attendeePhoneNumber": "…",
    "Your-business-or-website": "…",
    "Where-did-you-hear-about-us": "…",
    "notes": "…",
    "What-do-you-need": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `attendeePhoneNumber` (Phone number), `Your-business-or-website` (Your business or website), `Where-did-you-hear-about-us` (Where did you hear about us?), `notes` (What made you want to contact us?)
- Optional fields: `What-do-you-need` (What do you need?), `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.