Uses Microsoft RESTler to perform stateful REST API fuzzing: compiles an OpenAPI/Swagger spec into a RESTler grammar, configures authentication, and runs test/fuzz-lean/fuzz modes that generate request sequences exercising producer-consumer dependencies, then flags 500 errors, auth bypasses, resource leaks, and injection bugs.
Install
npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill performing-api-fuzzing-with-restlernpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill performing-api-fuzzing-with-restler -a claude-code -gnpx skills add mukul975/Anthropic-Cybersecurity-Skills --skill performing-api-fuzzing-with-restler -a codex -ggemini skills install https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git --path skills/performing-api-fuzzing-with-restlergh skill install mukul975/Anthropic-Cybersecurity-Skills performing-api-fuzzing-with-restlergit 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/performing-api-fuzzing-with-restler ~/.claude/skills/performing-api-fuzzing-with-restler # Claude Code
cp -R /tmp/mukul975__Anthropic-Cybersecurity-Skills/skills/performing-api-fuzzing-with-restler ~/.agents/skills/performing-api-fuzzing-with-restler # Codex, Cursor, Gemini CLI, Copilot, OpenCode