API Gateway
An API Gateway is a server that acts as an entry point for clients to interact with multiple backend services in a microservices architecture. It consolidates various APIs into a single interface, streamlining communication between clients and services. API Gateways manage requests, route them to the appropriate service, and handle authentication, load balancing, and rate limiting. This is essential in a distributed system, where individual microservices need to be orchestrated and protected. By providing security and operational control, API Gateways help optimize performance and prevent unauthorized access. Popular API Gateway solutions include AWS API Gateway, Kong, and NGINX.
How CodeBranch applies API Gateway in real projects
The definition above gives you the concept — but knowing what API Gateway means is different from knowing when and how to apply it in a production system. At CodeBranch, we have spent 20+ years building custom software across healthcare, fintech, supply chain, proptech, audio, connected devices, and more. Every entry in this glossary reflects how our engineering, architecture, and QA teams actually use these concepts on client projects today.
Our work combines AI-powered agentic development, the Spec-Driven Development (SDD) framework, CI/CD pipelines with agent rules, and production-grade quality gates. Whether you are evaluating a technology for your product, trying to understand a vendor proposal, or simply learning, this glossary is written to give you practical, accurate context — not theoretical abstractions.
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