Secure REST APIs with authentication, rate limiting, CORS, input validation, and security middleware. Use when building or hardening API endpoints against common attacks.

API Security Hardening Table of Contents [Overview]( overview) [When to Use]( when to use) [Quick Start]( quick start) [Reference Guides]( reference guides) [Best Practices]( best practices) Overview Implement comprehensive API security measures including authentication, authorization, rate limiting, input validation, and attack prevention to protect against common vulnerabilities. When to Use New API development Security audit remediation Production API hardening Compliance requirements High traffic API protection Public API exposure Quick Start Minimal working example: Reference Guides Detailed implementations in the references/ directory: Guide Contents [Node.js/Express API Security](references/nodejsexpress api security.md) Node.js/Express API Security [Python FastAPI Security](references/python fastapi security.md) Python FastAPI Security [API Gateway Security Configuration](references/api gateway security configuration.md) API Gateway Security Configuration Best Practices ✅ DO Use HTTPS everywhere Implement rate limiting Validate all inputs Use security headers Log security events Implement CORS properly Use strong authentication Version your APIs ❌ DON'T Expose stack traces Return detailed errors Trust user input Use HTTP for APIs Skip input validation Ignore rate limiting

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