> ## Documentation Index
> Fetch the complete documentation index at: https://docs.visualradioassist.live/llms.txt
> Use this file to discover all available pages before exploring further.

# Direct Local Bus / API SSL Connection

> To get direct browser access to the Core API and Studio Bus for the fastest communication possible in the VRA suite, you are required to install SSL certificates so the browser trusts the custom Core API.

To get direct browser access to the Core API and Studio Bus for the fastest communication possible in the VRA suite, you are required to install SSL certificates to make sure the browser trusts the custom Core API.

<Note>
  With Visual Radio Assist Core application version 4.5.12 the certificate bundle is automatically installed on startup, when not already detected in your store.
</Note>

## Local Certificate Bundle

`Last update: 17-03-2026`

Download Bundle:

{/* TODO bookmark/embed: https://app.notion.com/p/0bc2650bd8d24157827577b34cb2eb7f#32e560b53268807e8f8ae9eaaba5a218 */}

Install CA and Server Core certificates on your machine

## Add VRA Server Core to your hosts file

On your Core Machine, follow the steps for your OS:

### Mac OS

```bash theme={null}
sudo echo '127.0.0.1 core.vra.local' >> /etc/hosts
# optional
sudo echo '127.0.0.1 {studio_name}.core.vra.local' >> /etc/hosts
```

### Windows

```bash theme={null}
# Open your Hosts file
#  WIN + R > %systemroot%/system32/drivers/etc
#  File > Open Powershell|CMD as Administrator
#. Type "notepad hosts" + ENTER
# Add following lines and save

127.0.0.1 core.vra.local
# optional
127.0.0.1 {studio_name}.core.vra.local
```

(replace `{studio_name}` with your studio name)

Go to your [Core Settings](https://visualradio.cloud/studio/active/advanced/core) and adjust the Host to the configured host above.