---
title: http.response.headers
description: The HTTP response headers represented as a Map (or associative array).
image: https://developers.cloudflare.com/core-services-preview.png
---

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

[Skip to content](#%5Ftop) 

#  http.response.headers 

`http.response.headers` ` Map<Array<String>> ` 

The HTTP response headers represented as a Map (or associative array).

When there are repeating headers, the array includes them in the order they appear in the response. The keys convert to lowercase.

* **Decoding**: No decoding performed
* **Whitespace**: Preserved
* **Non-ASCII**: Preserved

**Note**: The availability of HTTP response fields depends on the exact Cloudflare feature and your Cloudflare plan.

Example value:

```
{"server": ["nginx"]}
```

Example usage:

```
any(http.response.headers["server"][*] == "nginx")
```

Categories: 
* Response
* Headers

```json
{"@context":"https://schema.org","@type":"TechArticle","@id":"https://developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/http.response.headers/#page","headline":"http.response.headers · Cloudflare Ruleset Engine docs","description":"The HTTP response headers represented as a Map (or associative array).","url":"https://developers.cloudflare.com/ruleset-engine/rules-language/fields/reference/http.response.headers/","inLanguage":"en","image":"https://developers.cloudflare.com/core-services-preview.png","publisher":{"@type":"Organization","name":"Cloudflare","url":"https://www.cloudflare.com/"},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"}}
{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/directory/","name":"Directory"}},{"@type":"ListItem","position":2,"item":{"@id":"/ruleset-engine/","name":"Ruleset Engine"}},{"@type":"ListItem","position":3,"item":{"@id":"/ruleset-engine/rules-language/","name":"Rules language"}},{"@type":"ListItem","position":4,"item":{"@id":"/ruleset-engine/rules-language/fields/","name":"Fields"}},{"@type":"ListItem","position":5,"item":{"@id":"/ruleset-engine/rules-language/fields/reference/","name":"Fields reference"}}]}
```