X-Clacks-Overhead Detector

by graycastlepress · graycastlepress.com · Just for Fun

Established publisherManifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

Detects X-Clacks-Overhead header and displays its value as a toast notification

Users

−6 in 30 days

Rating

5.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#91K

#76K among extensions

Version

1.0

updated 7 Jul 2024

Users

monthly, 2 years

Latest, 15 Oct 2026: 80 usersMove the mouse over the chart for any month

Ratings count

monthly, 2 years

Latest, 15 Oct 2026: 2 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About X-Clacks-Overhead Detector

There are hidden memorials to the dead in the internet's overhead! Inspired by the story of the Clacks in Terry Pratchett's Discworld series, developer use the "x-clacks-overhead" header to pay homage to those who have departed. "Keeping their name forever alive. As long as their name is still passed along the Clacks, Death cannot have them."