# Page Not Found

The URL `extending/backoffice-ui-api-documentation` does not exist.

You might be looking for one of these pages:
- [Backoffice Search](https://docs.umbraco.com/umbraco-cms/extending/backoffice-search.md)
- [Single Block Migration](https://docs.umbraco.com/umbraco-cms/extending/single-block-migration.md)
- [API Documentation](https://docs.umbraco.com/umbraco-cms/reference/api-documentation.md)
- [Overview](https://docs.umbraco.com/umbraco-cms/extending/build-on-umbraco-functionality.md)
- [.NET Localization](https://docs.umbraco.com/umbraco-cms/extending/language-files/net-localization.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://docs.umbraco.com/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://docs.umbraco.com/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/umbraco-cms/extending/backoffice-search.md`)
- Use `Accept: text/markdown` header for content negotiation