Curriculum · Phase 6 · Module 6.4

API Gateways, Rate Limiting, and Key Lifecycle

The gateway is where API security controls are enforced in one place: authentication offload, rate limiting, request validation, and logging. This module covers what an API gateway is responsible for, the rate-limiting algorithms that protect against abuse and runaway cost, and the full API-key lifecycle — issue, scope, rotate, revoke — plus the evidence each step produces. You then design rate limits and key management for five API tiers.