Claude Authenticity

Q: What is a Claude Code skill and how does the Claude Authenticity 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. Claude Authenticity is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Dev Tools category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Dev Tools · Sub-category: tools-misc · Last updated: 2026-05-21

ai:claude type:audit

Detect whether an API endpoint is backed by genuine Claude (not a wrapper, proxy, or impersonator) using 9 weighted rule-based checks that mirror the claude-verify project. Also extracts injected system prompts from providers that override Claude's identity. Fully self-contained — copy the code below and run, no extra packages beyond httpx. Use when the user wants to verify a Claude API key or endpoint, check if a third-party Claude service is authentic, audit API providers for Claude authenticity, test multiple models in parallel, or discover what system prompt a provider has injected.

From the source SKILL.md

Verify whether an API endpoint serves genuine Claude and optionally extract any injected system prompt.

pip install httpx

What this skill does

Claude Authenticity is a community-contributed Claude Code skill in the tools-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/claude-authenticity/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the user wants to verify a Claude API key or endpoint, check if a third-party Claude service is authentic, audit API providers for Claude authenticity, test multiple models in parallel, or discover what system prompt a provider has injected.

Who uses this skill

The Claude Authenticity Claude Code skill is built for developers, power users, and teams automating repetitive workflows and improving developer experience. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 117,000+ 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/claude-authenticity
curl -L https://claudskills.com/skills/claude-authenticity/SKILL.md \
  -o ~/.claude/skills/claude-authenticity/SKILL.md

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

Skills live at ~/.claude/skills/claude-authenticity/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\claude-authenticity\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 Claude Authenticity Claude Code skill?

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

What does the Claude Authenticity skill do?

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 Claude Authenticity skill?

Use Claude Authenticity when your Claude Code task falls under the Dev Tools category — specifically in the tools 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 Claude Authenticity" or describe the task and let Claude pick). Browse related skills at /category/tools/.

What is a Claude Code skill and how does the Claude Authenticity 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. Claude Authenticity is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Dev Tools category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/molloryn/claude-verify
Author: molloryn

Cite this skill

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

APA

molloryn. (2026). Claude Authenticity [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/claude-authenticity/

BibTeX

@misc{claude-authenticity-2026,
  author    = {molloryn},
  title     = {Claude Authenticity [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/claude-authenticity/}
}

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 →

Badge

[![ClaudSkills](https://claudskills.com/badge/claude-authenticity.svg)](https://claudskills.com/skills/claude-authenticity/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)

More Dev Tools skills

Browse all Dev Tools skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Dev Tools skills → Top 100 skills

Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

Part of Acreator Store — Adam Lankamer's AI tools: PerfectStudio · Ucaption · UTagger · AutoXPoster · TestYourSkills · AutomationFlows · Au Naturel · Telegram @acreatorstore