> For the complete documentation index, see [llms.txt](https://docs.klaytn.domains/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.klaytn.domains/english/domain/domain.md).

# .kaia Domains

The '.kaia' TLD (top-level domain) is owned by a smart contract, and any domain using the .kaia TLD such as 'kns.kaia' can be registered without permission.

The domains are available for registration on a yearly basis, and the registration fee differs by length. The pricing can be found on the [Registration Fee](/english/domain/price.md) page.

Domains must consist of roman alphabet small letters or numbers within 3 to 255 letters. This is a measure to prevent IDN homograph attacks (an attack that exploits users by using similar-looking letters and confusing them).


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# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.klaytn.domains/english/domain/domain.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.