Billing is a well-rated Claude Code skill (quality score 80/100) in the web-security sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/billing/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use when: billing audit, subscription lifecycle review, Stripe/Paddle integration check, webhook security, payment form CSRF, pricing centralization, webhook idempotency, billing bugs. Triggers: 'audit my billing', 'check subscription flow', 'is my checkout secure', 'review pricing config', 'find billing bugs', 'check webhooks'.
The Billing skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. 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.
mkdir -p ~/.claude/skills/billing curl -L https://claudskills.com/skills/billing/SKILL.md \ -o ~/.claude/skills/billing/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/billing/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/billing/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\billing\SKILL.md on Windows. See the full install guide for step-by-step instructions.
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.
Browse all Security skills in the ClaudSkills registry, or explore these top-rated picks from the same category: