Skill UI

An end-to-end workflow for building robust, production-ready Python backend APIs. This guide covers all stages, including project scaffolding, SQLAlchemy database integration, Pydantic validation, implementing JWT/OAuth2 authentication, comprehensive error handling, unit testing, and Docker deployment for modern microservices.

Comprehensive checklist for application security hardening, covering input validation, output encoding, SQL/CSRF defenses, security headers, JWT best practices, secrets handling, rate limiting, and dependency audits to keep web services resilient.

Provides authentication, authorization, encryption, secrets, and hardening patterns for designing secure auth flows, managing tokens, configuring CORS, and implementing best practices around API keys, JWT, OAuth, and rate limiting.

Implements a robust, enterprise-grade Role-Based Access Control (RBAC) system for Supabase. This skill teaches how to store custom roles (e.g., admin, editor, viewer) in JWT claims (`app_metadata`), enforce granular permissions, and scope access at the row level using PostgreSQL RLS policies. It covers organization scoping, role hierarchy management, and API key protection.

Validating Authentication Implementations assesses authentication mechanisms like JWT, OAuth, sessions, and API keys against security standards, then reports vulnerabilities and recommendations for password policy, MFA, token handling, and session security.

A comprehensive utility designed to assess the security posture of modern APIs, including REST, GraphQL, and gRPC. It strictly follows the OWASP API Security Top 10 framework, testing for critical vulnerabilities such as Broken Object/Function Level Authorization (BOLA/BFLA), SQL/NoSQL injection flaws, and weaknesses in authentication mechanisms like JWT manipulation. Essential for security engineers and penetration testers validating complex microservice architectures and API gateways.

This skill demonstrates how to exploit JWT algorithm confusion vulnerabilities. It targets APIs that do not strictly enforce the cryptographic algorithm (alg) specified in the token header. Techniques covered include downgrading from asymmetric algorithms (RS256) to symmetric ones (HS256) using the public key as the secret, performing alg:none bypasses, and manipulating key identifiers (kid, jku, x5u) to achieve authentication bypass and token forgery.

This comprehensive guide details how to implement centralized security controls at the API gateway layer. It covers critical functionalities such as JWT authentication enforcement, advanced rate limiting, request/response validation against OpenAPI specs, and integrating Web Application Firewalls (WAF). The process is applicable across major platforms like Kong, AWS API Gateway, and Azure APIM, ensuring robust defense in depth for microservices architecture.

This skill provides comprehensive knowledge on using JSON Web Tokens (JWT) for secure authentication and authorization. It covers implementing various cryptographic signing algorithms (such as HS256, RS256, ES256, and EdDSA), validating signatures, enforcing claim constraints (like expiration time), and implementing robust defenses against common JWT vulnerabilities, including algorithm confusion and the 'none' algorithm attack. Ideal for building secure, scalable web APIs.

This tool automates the process of executing the JWT none algorithm attack. It demonstrates how to bypass signature verification by setting the 'alg' header to 'none' in a JSON Web Token. This vulnerability allows attackers to forge tokens with arbitrary claims, such as escalating privileges or impersonating other users, and is crucial for penetration testing and API security auditing.

A comprehensive security script designed to test REST API authentication mechanisms for common vulnerabilities. It assesses broken token validation, missing authentication on critical endpoints, weak password policies, and session management flaws. The tool specifically evaluates JWT implementation, API key handling, and adherence to OWASP API Security Top 10, helping identify authentication bypasses before production deployment.

This guide details a comprehensive methodology for testing JSON Web Token (JWT) implementations against critical security vulnerabilities. It covers attacks such as algorithm confusion (e.g., RS256 to HS256), 'None' algorithm bypass, Key ID (kid) injection, JKU/X5U manipulation, and brute-forcing weak secrets. Essential for API and SSO security assessments.