ClaudSkills / Security / identity-access

Testing For JSON Web Token Vulnerabilities

Q: What is a Claude Code skill and how does the Testing For JSON Web Token Vulnerabilities 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. Testing For JSON Web Token Vulnerabilities is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Security · Sub-category: identity-access · Last updated: 2026-05-21

Test JWT implementations for critical vulnerabilities including algorithm confusion, none algorithm bypass, kid

About this skill (catalog notes)

Testing For JSON Web Token Vulnerabilities includes a dedicated installation section; worked examples; 7 code blocks for direct copy-paste. The SKILL.md runs to about 1,224 words, in the catalog's typical mid-range.

License: Apache-2.0
Original author: mahipal
Indexed lastmod: 2026-05-21
Catalog position: Security · identity-access
Indexed related skills: 10

How Testing For JSON Web Token Vulnerabilities fits the catalog

Testing For JSON Web Token Vulnerabilities sits in the Security category under the identity-access 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.

What this skill does

Testing For JSON Web Token Vulnerabilities is a community-contributed Claude Code skill in the identity-access sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/testing-for-json-web-token-vulnerabilities/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Testing For JSON Web Token Vulnerabilities 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 116,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/testing-for-json-web-token-vulnerabilities
curl -L https://claudskills.com/skills/testing-for-json-web-token-vulnerabilities/SKILL.md \
  -o ~/.claude/skills/testing-for-json-web-token-vulnerabilities/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/testing-for-json-web-token-vulnerabilities/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/testing-for-json-web-token-vulnerabilities/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\testing-for-json-web-token-vulnerabilities\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 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.

See pricing → Download desktop app

Frequently asked questions

How do I install the Testing For JSON Web Token Vulnerabilities Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/testing-for-json-web-token-vulnerabilities/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Testing For JSON Web Token Vulnerabilities skill do?

Test JWT implementations for critical vulnerabilities including algorithm confusion, none algorithm bypass, kid

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 Testing For JSON Web Token Vulnerabilities skill?

Use Testing For JSON Web Token Vulnerabilities when your Claude Code task falls under the Security category — specifically in the identity access 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 Testing For JSON Web Token Vulnerabilities" or describe the task and let Claude pick). Browse related skills at /category/security/.

What is a Claude Code skill and how does the Testing For JSON Web Token Vulnerabilities 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. Testing For JSON Web Token Vulnerabilities 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/.

Attribution & license

Source: https://github.com/ticarpi/jwt_tool.git
License: Apache-2.0
Author: mahipal

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

mahipal. (2026). Testing For JSON Web Token Vulnerabilities [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/testing-for-json-web-token-vulnerabilities/

BibTeX

@misc{testing-for-json-web-token-vulnerabilities-2026,
  author    = {mahipal},
  title     = {Testing For JSON Web Token Vulnerabilities [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/testing-for-json-web-token-vulnerabilities/}
}

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Badge

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