This plugin hasn’t been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Is Varnish Working?


Test your wordpress url to see if it contains the Varnish Cache HTTP headers using the API available at


How does this work?

It takes the URL of your wordpress installation and runs it through the API at and checks the HTTP headers for the X-Varnish, X-Cache and other varnish HTTP headers.


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Contributors & Developers

“Is Varnish Working?” is open source software. The following people have contributed to this plugin.


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  • Added more error handling fixes


  • Added ajax response to deal with API errors


  • Created the plugin