Development

API Security Best Practices for Developers (2026)

Published 2026-03-26 · 5 min read

Top API Vulnerabilities

OWASP API Security Top 10:

1. Broken Object Level Authorization
2. Broken Authentication
3. Broken Object Property Level Authorization
4. Unrestricted Resource Consumption
5. Broken Function Level Authorization

Essential Security Controls

Authentication: Use OAuth 2.0 / JWT, never API keys in URLs
Authorization: Check permissions on every request
Input Validation: Validate and sanitize all input
Rate Limiting: Prevent abuse and DDoS
Encryption: TLS 1.3 for all traffic
Logging: Log all access, monitor anomalies

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