OWASP API Security Top 10 (2023) with production Next.js App Router code — access control, authentication, input validation, rate limiting, security headers, data exposure, supply chain, SSRF
Install
npx skills add LeahyCC/claude-skills --skill api-securitynpx skills add LeahyCC/claude-skills --skill api-security -a claude-code -gnpx skills add LeahyCC/claude-skills --skill api-security -a codex -ggemini skills install https://github.com/LeahyCC/claude-skills.git --path skills/api-securitygh skill install LeahyCC/claude-skills api-securitygit clone --depth 1 https://github.com/LeahyCC/claude-skills /tmp/LeahyCC__claude-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/LeahyCC__claude-skills/skills/api-security ~/.claude/skills/api-security # Claude Code
cp -R /tmp/LeahyCC__claude-skills/skills/api-security ~/.agents/skills/api-security # Codex, Cursor, Gemini CLI, Copilot, OpenCode