Discover and inventory shadow API endpoints that operate outside documented OpenAPI/Swagger specs, using traffic analysis against API gateways (Kong, AWS API Gateway, Envoy), cloud configuration scanning, and source code repository mining for undocumented routes.
Install
npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill detecting-shadow-api-endpointsnpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill detecting-shadow-api-endpoints -a claude-code -gnpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill detecting-shadow-api-endpoints -a codex -ggemini skills install https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git --path skills/detecting-shadow-api-endpointsgh skill install mukul975/Anthropic-Cybersecurity-Skills detecting-shadow-api-endpointsgit clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills /tmp/mukul975__Anthropic-Cybersecurity-Skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/mukul975__Anthropic-Cybersecurity-Skills/skills/detecting-shadow-api-endpoints ~/.claude/skills/detecting-shadow-api-endpoints # Claude Code
cp -R /tmp/mukul975__Anthropic-Cybersecurity-Skills/skills/detecting-shadow-api-endpoints ~/.agents/skills/detecting-shadow-api-endpoints # Codex, Cursor, Gemini CLI, Copilot, OpenCode