---
title: Reference
description: Reference information for custom error rules and error pages.
image: https://developers.cloudflare.com/core-services-preview.png
---

> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/rules/llms.txt  
> Use this file to discover all available pages before exploring further.

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# Reference

This section contains reference information for Custom Errors.

* [ Custom Errors parameters ](https://developers.cloudflare.com/rules/custom-errors/reference/parameters/)
* [ Error tokens ](https://developers.cloudflare.com/rules/custom-errors/reference/error-tokens/)
* [ Error page types ](https://developers.cloudflare.com/rules/custom-errors/reference/error-page-types/)

```json
{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/directory/","name":"Directory"}},{"@type":"ListItem","position":2,"item":{"@id":"/rules/","name":"Rules"}},{"@type":"ListItem","position":3,"item":{"@id":"/rules/custom-errors/","name":"Custom Errors"}},{"@type":"ListItem","position":4,"item":{"@id":"/rules/custom-errors/reference/","name":"Reference"}}]}
```