Write and debug Tampermonkey userscripts for browser automation, page modification, and web enhancement. Use whenever the user mentions userscripts, Tampermonkey, Greasemonkey, Violentmonkey, or wants to write a script that runs on a website - even if they don't say 'userscript' explicitly. Also trigger for: injecting JavaScript or CSS into web pages, modifying website behaviour, hiding page elements, form auto-fill, scraping page data, intercepting requests, detecting URL changes in SPAs, adding keyboard shortcuts to websites, tab audio control, or TypeScript userscripts. Covers all header tags (@match, @grant, @require, @run-in), GM_* synchronous APIs, GM.* promise-based APIs (recommended for new scripts), batch storage (GM.getValues/setValues v5.3+), binary data support (v5.4+), TypeScript setup via @types/tampermonkey, security sandboxing, and cross-browser compatibility (Chrome, Firefox, Edge). Do NOT use for Selenium/Puppeteer automation, browser extensions (WebExtensions/MV3), or server-side scripts.
Tampermonkey includes 7 code blocks for direct copy-paste. The SKILL.md runs to about 1,404 words, in the catalog's typical mid-range.
Original author
henkisdabro
Indexed lastmod
Catalog position
Security · security-misc
Indexed related skills
10
How Tampermonkey fits the catalog
Tampermonkey sits in the Security category under the security-misc sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.
These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.
From the source SKILL.md
Expert guidance for writing Tampermonkey userscripts - browser scripts that modify web pages, automate tasks, and enhance browsing experience.
What this skill does
Tampermonkey is a community-contributed Claude Code skill in the security-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/tampermonkey/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use whenever the user mentions userscripts, Tampermonkey, Greasemonkey, Violentmonkey, or wants to write a script that runs on a website - even if they don't say 'userscript' explicitly. Also trigger for: injecting JavaScript or CSS into web pages, modifying website behaviour, hiding page elements, form auto-fill, scraping page data, intercepting requests, detecting URL changes in SPAs, adding keyboard shortcuts to websites, tab audio control, or TypeScript userscripts.
Who uses this skill
The Tampermonkey Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 115,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
Or just download SKILL.md directly and drop it into ~/.claude/skills/tampermonkey/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/tampermonkey/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\tampermonkey\SKILL.md on Windows. See the full install guide for step-by-step instructions.
Telegram
📱 Install from your phone or desktop Telegram
Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →
Pro
One-click install via the desktop app
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
Pro
For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.
How do I install the Tampermonkey Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/tampermonkey/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Tampermonkey skill do?
Write and debug Tampermonkey userscripts for browser automation, page modification, and web enhancement. Use whenever the user mentions userscripts, Tampermonkey, Greasemonkey, Violentmonkey, or wants to write a script that runs on a website - even if they don't say 'userscript' explicitly. Also trigger for: injecting JavaScript or CSS into web pages, modifying website behaviour, hiding page elements, form auto-fill, scraping page data, intercepting requests, detecting URL changes in SPAs, adding keyboard shortcuts to websites, tab audio control, or TypeScript userscripts. Covers all header tags (@match, @grant, @require, @run-in), GM_* synchronous APIs, GM.* promise-based APIs (recommended for new scripts), batch storage (GM.getValues/setValues v5.3+), binary data support (v5.4+), TypeScript setup via @types/tampermonkey, security sandboxing, and cross-browser compatibility (Chrome, Firefox, Edge). Do NOT use for Selenium/Puppeteer automation, browser extensions (WebExtensions/MV3), or server-side scripts.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Tampermonkey skill?
Use Tampermonkey when your Claude Code task falls under the Security category — specifically in the security misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Tampermonkey" or describe the task and let Claude pick). Browse related skills at /category/security/.
What is a Claude Code skill and how does the Tampermonkey skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Tampermonkey is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.
@misc{tampermonkey-2026,
author = {henkisdabro},
title = {Tampermonkey [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/tampermonkey/}
}
Embed this skill
Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →
Claude™ is a trademark of Anthropic PBC. ClaudSkills (also referred to as Claude Skills or Claude Code Skills Catalog) is an independent community-curated registry of SKILL.md files, not affiliated with, endorsed by, or sponsored by Anthropic.
Install ClaudSkills — browse 70k+ skills offline, one tap from your home screen.