# Page Not Found

The URL `add-tips-or-surcharges-to-the-store/calculate-surcharges-on-your-server` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [Add more features to your custom app](https://docs.ecwid.com/get-started/add-more-features-to-your-custom-app.md)
- [Make your first API request](https://docs.ecwid.com/get-started/make-your-first-api-request.md)
- [Public apps overview](https://docs.ecwid.com/launch-apps/public-apps-overview.md)
- [Community libraries](https://docs.ecwid.com/develop-apps/community-libraries.md)
- [API glossary](https://docs.ecwid.com/get-started/api-glossary.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.ecwid.com/get-started/add-more-features-to-your-custom-app.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.ecwid.com/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.ecwid.com/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., `/get-started/add-more-features-to-your-custom-app.md`).

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