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ClaudSkills / Security / web-security

Csrf Auth Debugger

Category: Security  ·  Sub-category: web-security  ·  Last updated:
type:debug
Debug CSRF token issues and authentication problems including 403 Forbidden errors, cookie issues, JWT tokens, OAuth flows, and session management. Use when troubleshooting CSRF verification failed, 403 errors on POST requests, login not working, or token refresh issues.

From the source SKILL.md

Analyzes and debugs CSRF and authentication issues in this project.

What this skill does

Csrf Auth Debugger is a community-contributed Claude Code skill in the web-security sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/csrf-auth-debugger/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when troubleshooting CSRF verification failed, 403 errors on POST requests, login not working, or token refresh issues.

Who uses this skill

The Csrf Auth Debugger 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/csrf-auth-debugger
curl -L https://claudskills.com/skills/csrf-auth-debugger/SKILL.md \
  -o ~/.claude/skills/csrf-auth-debugger/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/csrf-auth-debugger/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/csrf-auth-debugger/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\csrf-auth-debugger\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.

Frequently asked questions

How do I install the Csrf Auth Debugger Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/csrf-auth-debugger/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Csrf Auth Debugger skill do?
Debug CSRF token issues and authentication problems including 403 Forbidden errors, cookie issues, JWT tokens, OAuth flows, and session management. Use when troubleshooting CSRF verification failed, 403 errors on POST requests, login not working, or token refresh issues.
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 Csrf Auth Debugger skill?
Use Csrf Auth Debugger when your Claude Code task falls under the Security category — specifically in the web security 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 Csrf Auth Debugger" or describe the task and let Claude pick). Browse related skills at /category/security/.
What is a Claude Code skill and how does the Csrf Auth Debugger 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. Csrf Auth Debugger 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/.

Cite this skill

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

APA
ClaudSkills. (2026). Csrf Auth Debugger [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/csrf-auth-debugger/
BibTeX
@misc{csrf-auth-debugger-2026,
  author    = {ClaudSkills},
  title     = {Csrf Auth Debugger [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/csrf-auth-debugger/}
}

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