Who is X-Clacks-Overhead for?

X-Clacks-Overhead is an open-source project built for firefox users and Terry Pratchett fans.

What platforms does X-Clacks-Overhead run on?

X-Clacks-Overhead runs on the web and embeddable surfaces.

Is X-Clacks-Overhead still maintained?

Unverified. X-Clacks-Overhead has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What are alternatives to X-Clacks-Overhead?

Similar projects tracked by PulseGate include Hashrate Lens, SaveAI, and Codex File Drop.

Who develops X-Clacks-Overhead?

X-Clacks-Overhead is developed by Sixthhokage1.

When did X-Clacks-Overhead launch?

X-Clacks-Overhead first shipped in 2019.

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X-Clacks-Overhead

Name: X-Clacks-Overhead
Author: Sixthhokage1

github.comBrowser DevTools & extensions

X-Clacks-Overhead is an open-source Firefox extension that detects and displays the X-Clacks-Overhead HTTP header using Clacks Semaphore. It is intended for Firefox users who want to see this literary tribute while browsing compatible websites.

Open SourceWebEmbeddable

Visit github.com

Overview

4 features

X-Clacks-Overhead is a Browser DevTools & extensions project. It focuses on displaying the X-Clacks-Overhead message in a browser without manually inspecting HTTP headers. X-Clacks-Overhead is an open-source project aimed at firefox users and Terry Pratchett fans. X-Clacks-Overhead is open source under the Open Source license. X-Clacks-Overhead is available on the web and embeddable surfaces.

It is developed by Sixthhokage1, and it first shipped in 2019. Key capabilities include header detection, clacks display, and firefox integration.

Summary written by a language model from the project’s public pages.

Header detection
Clacks display
Firefox integration
Browser toolbar access

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

License

Open Source

Verified signals

HTTPSPrivacy Policy Terms of ServiceOpen SourceFree tierStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed9 Sept · 21:57 UTC
X-Clacks-Overhead verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about X-Clacks-Overhead

What does X-Clacks-Overhead do?: X-Clacks-Overhead focuses on displaying the X-Clacks-Overhead message in a browser without manually inspecting HTTP headers. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is X-Clacks-Overhead for?: X-Clacks-Overhead is an open-source project built for firefox users and Terry Pratchett fans.
Does X-Clacks-Overhead have a free plan?: Yes — X-Clacks-Overhead is open source under the Open Source license and free to use.
What platforms does X-Clacks-Overhead run on?: X-Clacks-Overhead runs on the web and embeddable surfaces.
Is X-Clacks-Overhead still maintained?: Unverified. X-Clacks-Overhead has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What are alternatives to X-Clacks-Overhead?: Similar projects tracked by PulseGate include Hashrate Lens, SaveAI, and Codex File Drop.Hashrate Lens SaveAI Codex File Drop
Who develops X-Clacks-Overhead?: X-Clacks-Overhead is developed by Sixthhokage1.
When did X-Clacks-Overhead launch?: X-Clacks-Overhead first shipped in 2019.

At a glance

Pricing: Open Source
Platforms: Web
Languages: English
License: Open Source
First seen: 9 Sept 2026
Built for: Firefox users and Terry Pratchett fans
Model: Open source
Solves: Displaying the X-Clacks-Overhead message in a browser without manually inspecting HTTP headers.

Registered as

Firefox Add-ons: x-clacks-overhead

Developer

Sixthhokage1

Index record

Indexed: 9 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 9 Sept 2026

Identity audit (13)

Slug: x-clacks-overhead-github-com
Lifecycle state recorded: 9 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 9 Sept 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Written by a language model from the project's public pages.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 9 Sept 2026
Canonical URL: https://github.com/Sixthhokage1/x-clacks-overhead

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