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

# Browser

> The chat UI served from localhost.

```sh theme={null}
aster serve
```

Serves the chat UI at `http://localhost:4187` and opens it. Off loopback, a
token is required in the URL, so an exposed port is not an open door.