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API Gateway and Microservices Communication Patterns

3 min readMay 16, 2025

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Imagine walking into a bustling food court. There are counters for Indian, Chinese, Italian cuisines. Instead of running to each counter, you place your entire order with a single server who coordinates everything behind the scenes and brings your food to the table.

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That server is the API Gateway in your distributed system. It handles requests, orchestrates calls to various services, enforces rules, and delivers a unified response.

What Is an API Gateway?

An API Gateway is the single entry point for all clients (mobile, web, third-party). It manages requests by:

  • Routing to appropriate microservices
  • Aggregating data from multiple services
  • Enforcing authentication, rate limiting, logging, caching, etc.

Why Use an API Gateway?

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High-Level Architecture

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Staff Engineer (13+ y) helping engineers crack System Design interviews & grow into Staff roles. Real stories, not theory. 1:1 mentoring→ codefarm.in/mentorship