An API gateway sits in front of backend services as a single entry point, routing requests and centralizing cross-cutting concerns like authentication, rate limiting, caching, and response aggregation.
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An API gateway sits in front of backend services as a single entry point, routing requests and centralizing cross-cutting concerns like authentication, rate limiting, caching, and response aggregation.
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It maps incoming paths to the right backend service and can aggregate several calls into one response.
Authentication, rate limiting, TLS termination, and logging all live in one place.
It simplifies clients but can become a bottleneck or single point of failure if it is not scaled.
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A load balancer spreads traffic across identical servers; a gateway also routes by API, aggregates calls, and enforces policy.
It adds a network hop, but centralized caching and connection reuse often offset the cost.
