What is an API Gateway, and when would you use it in an architecture?

• API Gateway is a single entry point for APIs in a microservices architecture.
• Handles routing, load balancing, authentication, rate limiting, logging,

monitoring.

• Examples: Kong, NGINX, AWS API Gateway, Azure API Management.
• Use when:
• You have multiple microservices.
• Need centralized authentication/security.
• Need rate limiting or monitoring.