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What is Amazon API Gateway? The Ultimate Guide

Amazon API Gateway is a fully managed service that lets you: ✅ Create ✅ Publish ✅ Secure ✅ Monitor ✅ Scale ...REST, HTTP, and WebSocket APIs—without managing any servers. Think of it as the gatekeeper between your frontend (clients) and backend (Lambdas, EC2, DynamoDB, etc.). ⚙️ How It Works (Simple Flow) [User / Client] ↓ [API Gateway] ← rate limits, security, validation ↓ [Backend] → Lambda / EC2 / DynamoDB / S3 / etc. ↓ [API Gateway] ↓ [Client gets response] You define routes (GET /products, POST /order), and API Gateway handles: Traffic management Throttling Security (Auth, WAF, CORS) Request/Response transformations

Apr 23, 2025 - 00:34

What is Amazon API Gateway? The Ultimate Guide

Amazon API Gateway is a fully managed service that lets you:

✅ Create

✅ Publish

✅ Secure

✅ Monitor

✅ Scale

...REST, HTTP, and WebSocket APIs—without managing any servers.

Think of it as the gatekeeper between your frontend (clients) and backend (Lambdas, EC2, DynamoDB, etc.).

⚙️ How It Works (Simple Flow)

[User / Client]  
     ↓  
 [API Gateway] ← rate limits, security, validation  
     ↓  
[Backend] → Lambda / EC2 / DynamoDB / S3 / etc.  
     ↓  
[API Gateway]  
     ↓  
[Client gets response]

You define routes (GET /products, POST /order), and API Gateway handles:

Traffic management
Throttling
Security (Auth, WAF, CORS)
Request/Response transformations