SAM Local (Beta) sam is the AWS CLI tool for managing Serverless applications written with AWS Serverless Application Model (SAM). SAM Local can be used to test functions locally, start a local API Gateway from a SAM template, validate a SAM template, and generate sample payloads for various event sources.

What does Sam local start API do?

Allows you to run your serverless application locally for quick development and testing. When you run this command in a directory that contains your serverless functions and your AWS SAM template, it creates a local HTTP server that hosts all of your functions.

Can I run AWS locally?

You can use AWS SAM with a variety of AWS toolkits and debuggers to test and debug your serverless applications locally. For example, you can perform local step-through debugging of your Lambda functions by setting breakpoints, inspecting variables, and executing function code one line at a time.