# Page Not Found

The URL `appendices/10-minute-tutorial-how-to-get-etherscan-api-key` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [How Does the KRNL Protocol Work?](https://docs.krnl.xyz/getting-started/how-does-kos-work.md)
- [Target Base Contract](https://docs.krnl.xyz/smart-contract/how-to-integrate-your-smart-contract-with-kos.md)
- [How to Construct a Workflow](https://docs.krnl.xyz/krnl-studio/how-to-construct-a-workflow.md)
- [New to Web3?](https://docs.krnl.xyz/helpful-resources/new-to-web3.md)
- [Getting Started](https://docs.krnl.xyz/getting-started/getting-started-with-krnl.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://docs.krnl.xyz/getting-started/how-does-kos-work.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.

### Option 2 — Browse the documentation index

Full index: https://docs.krnl.xyz/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://docs.krnl.xyz/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/getting-started/how-does-kos-work.md`).

You may also use `Accept: text/markdown` header for content negotiation.