HTTP response header

X-Clacks-Overhead is a non-standardised HTTP header based upon the fictional work of the late great Sir Terry Pratchett. This plugin enables you to add the pre-requisite 'GNU Terry Pratchett' as well as other custom X-Clacks-Overhead headers to Craft.

Header usage statistics

X-Clacks-Overhead response header information and usage statistics.

Websites using header X-Clacks-Overhead 38,290
Percentage of websites that use X-Clacks-Overhead header <0.1%
Total discovered header values 145
Header uses directives No
Header values are unique or random No
Most popular in the country United States of America

X-Clacks-Overhead Often Used Together:

Distribution by websites popularity

X-Clacks-Overhead detection in the top websites by popularity

Top 10k sites 32 websites
Top 100k sites 248 websites
Top 1m sites 1,345 websites

Websites utilizing X-Clacks-Overhead

List of websites that use X-Clacks-Overhead header

Domain Country Rank Contacts
reddit.com United States of America 35
www.reddit.com United States of America 35
www.mozilla.org United States of America 158
tools.ietf.org United States of America 324
boingboing.net United States of America 482
heise.de Germany 659
See full domain list
Flat price per the report, subscription is not required.

Geographical Distribution

Header usage distribution by websites across the globe.

Common header values

List of top common X-Clacks-Overhead header values

Header value Value prevalence
GNU Terry Pratchett 96.38%
GNU Terry Pratchet 2.04%
GNU Natalie Nguyen 0.24%
GNU Terry Pratchett, Stephen Hawking, Prof. Dr. Georg Riccabona 0.20%
GNU Terry Pratchett, Douglas Adams 0.13%
GNU Terry Pratchett, Paul Brown, Gaz Hunter 0.08%
"GNU Terry Pratchett" 0.07%
GNU Terry Pratchett, Lester Haines 0.05%
GNU William Hartnell, Patrick Troughton, Jon Pertwee 0.04%
GNU Terry Pratchett, Stephen Hawking 0.04%
Terry Pratchett, Noirin Trouble Pluinceid, Dan Kaminsky 0.04%
GNU Terry Pratchett GNU Iain Banks 0.03%
GNU Terry Pratchett, Leonard Nimoy, Alan Rickman, B. B. King, David Bowie, Natalie Cole, Ben E. King, Ron Glass, Christopher Lee & Ian Fraser Kilmister 0.03%
GNU Terry Pratchett, GNU Iain Banks, GNU John Peel, GNU Simon Ricketts 0.02%
GNU Romana Kitty, GNU Ben Grayman, GNU Michael Hofer, GNU Lincoln Kliman, GNU Larry Scharf 0.02%
GNU Annemiek Lutz 0.02%
Natalie Nguyen, Shiina Mota, Amelia Rose 0.02%
GNU Sir Terry Pratchett 0.02%
GNU Terry Pratchett, Steve Irwin, Steve Jobs 0.01%
GNU Terry Pratchett, BiL Douglas, Keith Dale 0.01%