# Free 30 minute call with Astro

> A free 30 minute call to talk through what you’re building or what keeps breaking. We’ll map where the work happens, what happens when it fails, and whether you can see it. No prep needed. If you have a link to your app or repo, add it in the booking notes. I’ll tell you honestly whether I’m the right fit.

- Host: Astro
- Duration: 30 min
- Location: Cal Video, Google Meet
- Host time zone: Africa/Lagos
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/astroszndev/30min
- Event type id: 7756835

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=7756835&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": 7756835,
  "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.