> For the complete documentation index, see [llms.txt](https://clients.medianova.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://clients.medianova.com/products/performance-cdn/dynamic-content-acceleration/advanced-configuration/headers/custom-header.md).

# Custom Header

The **Custom Header** feature for Dynamic Content Acceleration operates the same way as in Static Content Delivery.\
It enables CDN edge servers to add, modify, or remove HTTP headers for both origin requests and CDN responses. You can define multiple rule types—such as adding origin request headers, adding or removing CDN response headers, or applying raw header directives—to customize how headers are processed during dynamic delivery.

For configuration details, rule types, and examples, refer to the main documentation:\
**Learn more in the** [**Custom Header documentation**](/products/performance-cdn/static-content-delivery/advanced-configuration/headers/custom-header.md)**.**


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://clients.medianova.com/products/performance-cdn/dynamic-content-acceleration/advanced-configuration/headers/custom-header.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.