---
title: Add request header with a static value
description: Create a request header transform rule to add an `X-Source` HTTP header to the request with a static value (`Cloudflare`).
image: https://developers.cloudflare.com/core-services-preview.png
---

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# Add request header with a static value

Create a request header transform rule to add an `X-Source` HTTP header to the request with a static value (`Cloudflare`).

The following request header transform rule adds a header named `X-Source` with a static value (`Cloudflare`) to the HTTP request:

Text in **Expression Editor**:

```
starts_with(http.request.uri.path, "/en/")
```

Selected operation under **Modify request header**: _Set static_

**Header name**: `X-Source`

**Value**: `Cloudflare`

```json
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```