Claude Authenticity

Quality score: 70/100 · Category: Dev Tools · Sub-category: tools-misc

ai:claudetype: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.

What this skill does

Claude Authenticity is a production-ready Claude Code skill (quality score 70/100) 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 skill is built for developers, power users, and teams automating repetitive workflows and improving developer experience. It is part of the open ClaudSkills registry, a community-curated catalog of 15,000+ capabilities you can install for Claude Code — the Claude CLI agent.

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.

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.

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

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