> For the complete documentation index, see [llms.txt](https://docs.fortmatic.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fortmatic.com/v1.x/fortmatic-native/configuration.md).

# Configuration

The Fortmatic SDK offers an endpoint for customizing certain UI behavior.

```javascript
import Fortmatic from 'fortmatic';

const fm = new Fortmatic('YOUR_API_KEY');
fm.configure({ ... });
```

As of `v1.0.1`, the only endpoint that makes use of configuration is [`Fortmatic.user.login`](/v1.x/fortmatic-native/log-in.md).