Skip to main content

Exploring SST: A Comprehensive Guide for AWS Developers


Exploring SST: A Comprehensive Guide for AWS Developers

In the evolving landscape of serverless computing, Serverless Stack Toolkit (SST) is a major player. Here's why.

What is SST?

SST, or Serverless Stack Toolkit, is a serverless framework that brings together the best of AWS Cloud Development Kit (CDK) and modern application development practices. SST allows you to define your infrastructure using familiar programming languages, and its features simplify the entire process of developing and deploying a serverless application.

Why Use SST?

SST is appealing to AWS developers for several reasons:


SST is built on top of AWS CDK, allowing developers to define their infrastructure using popular languages like TypeScript or Python. It offers a friendly learning curve for those new to serverless architecture or AWS.

Accelerated Development

With "Live Lambda Development", SST enables live reloading of Lambda functions. This means changes made to your code are immediately reflected in your functions, saving significant development time.

Robust Testing

SST supports running tests against the deployed stack using familiar testing frameworks. This capability allows you to ensure your application functions as intended in a production-like environment.

Simplified Deployment

SST provides an easier path to deploy applications across different stages, managing AWS resources and their dependencies.

Setting Up SST

To get started with SST, you'll first need to install Node.js and AWS CDK. Once you have those installed, you can install SST globally using npm:

npm install -g serverless-stack

Next, create a new SST app:

npx create-serverless-stack@latest my-sst-app

This will create a new directory my-sst-app with a minimal SST app.

Writing Your First SST Application

Navigate to your newly created directory and open lib/my-sst-app-stack.js. Here's an example of what a simple SST application might look like:

import * as sst from '@serverless-stack/resources';

class MyStack extends sst.Stack {
  constructor(scope, id, props) {
    super(scope, id, props);

    // Define your stack
    new sst.Api(this, 'Api', {
      routes: {
        'GET /': 'src/lambda.handler',

export default function main(app) {
  new MyStack(app, 'my-sst-app');

This application creates an API Gateway with a single route that triggers a Lambda function located at src/lambda.js.

To start the Live Lambda Development environment, use the start command:

npx sst start


SST presents a significant leap forward for serverless development on AWS. By bridging the gap between development and deployment, it allows for faster iterations and higher confidence when releasing applications. With its intuitive design and robust capabilities, SST is well-positioned to become a staple in the toolchain of serverless developers.