01 Introduction To Serverless Apis

title: Introduction to Serverless APIs — Complete Beginner's Guide weight: 11 date: 2026-06-28 lastmod: 2026-06-28 description: Learn what serverless APIs are, how FaaS platforms like AWS Lambda work, and the benefits of event-driven, auto-scaling, pay-per-execution architecture. tags: [api-development, serverless]

Serverless APIs use Function-as-a-Service (FaaS) platforms like AWS Lambda to run code in response to events without managing servers, scaling automatically and charging only for execution time.

```mermaid
flowchart TD
  A[API Request] --> B[API Gateway]
  B --> C[Lambda Function]
  C --> D[DynamoDB / S3]
  C --> E[Response]
  style A fill:#e1f5fe
  style B fill:#fff9c4
  style C fill:#c8e6c9

Serverless computing abstracts server management. You write functions, configure triggers (HTTP requests, database changes, file uploads), and the platform handles scaling, availability, and maintenance. AWS Lambda is the most popular FaaS platform, supporting Node.js, Python, Java, and Go.

Think of serverless like a vending machine versus a restaurant kitchen. A restaurant kitchen (traditional server) must be staffed and ready even when empty. A vending machine (serverless) only works when someone inserts money, and it handles one order at a time without dedicated staff.

What's Next

Now learn about FaaS concepts in Building Serverless APIs.