# Page Not Found

The URL `en/latest/contracts-and-transactions/developer-tools.html` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [What Developers tools are?](https://docs.expanse.tech/developer/what-developers-tools-are.md)
- [Contracts, transactions, account types, and gas](https://docs.expanse.tech/developer/contracts-transactions-account-types-and-gas.md)
- [Accessing contracts and transactions](https://docs.expanse.tech/developer/accessing-contracts-and-transactions.md)
- [How to add a token to Metamask?](https://docs.expanse.tech/beginner/how-to-add-a-token-to-metamask.md)
- [What are the static, trusted and boot Nodes?](https://docs.expanse.tech/developer/what-are-the-static-trusted-and-boot-nodes.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.expanse.tech/developer/what-developers-tools-are.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.expanse.tech/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.expanse.tech/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., `/developer/what-developers-tools-are.md`).

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