# Intro call with MoonShift Lab with MoonShift Lab

> A free 30-minute working session about your project. Tell us what you're building and what's blocking you, and you'll get a straight answer about scope, cost, and timeline. If the project looks like a fit, you'll receive a fixed written proposal within 48 hours. If we're not the right fit, we'll say so and point you somewhere useful. No sales script, no pressure.

- Host: MoonShift Lab
- Duration: 30 min
- Location: Cal Video
- Host time zone: Europe/Berlin
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/moonshiftlab/intro
- Event type id: 6366648

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=6366648&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": 6366648,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "Company-or-project-name": "…",
    "What-would-you-like-to-discuss": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address)
- Optional fields: `Company-or-project-name` (Company or project name), `What-would-you-like-to-discuss` (What would you like to discuss?), `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.