---
title: req.headers
summary: null
url: >-
  https://www.fastly.com/documentation/reference/vcl/variables/client-request/req-headers
---

**Type:** STRING  
**Access:** read-only

**Available in:** all subroutines

Collection of HTTP headers associated with the client request.
Used in conjunction with [std.count](https://www.fastly.com/documentation/reference/vcl/functions/miscellaneous/std-count/) to count the number of headers in the client request.