January 31, 2026 - You write and organize your code in Lambda functions, which are the basic building blocks you use to create a Lambda application. You control security and access through Lambda permissions, using execution roles to manage what AWS services your functions can interact with and what resource policies can interact with your code.

The function lambda_handler takes two arguments, event and context. An event in Lambda is a JSON formatted document that contains data for your function to process. If your function is invoked by another AWS service, the event object contains information about the event that caused the invocation.

2 days ago - AWS Lambda is a serverless compute service for running code without having to provision or manage servers. You pay only for the compute time you consume.

September 7, 2020 - Lambda replaces that model by providing you with a fleet of completely anonymous servers whose specs and names you don't know and don't care about. The advantage is that you don't have to manage or even interact with the fleet in any way - you ...

The AWS::Lambda::Function resource creates a Lambda function. To create a function, you need a deployment package and an execution role. The deployment package is a .zip file archive or container image that contains your function code.

When a function is first invoked, Lambda creates a new execution environment for the function to run in. After the function has finished running, Lambda doesn't stop the execution environment right away; if the function is invoked again, Lambda can re-use the existing execution environment.

Learn how to use the Lambda API or console to create and configure Lambda functions.

January 12, 2026 - For example : A new image uploaded to an Amazon S3 bucket (Event Source) triggers a Lambda Function (Your Code) that resizes the image and saves the new version back to another S3 bucket (Downstream Service) No Servers to Manage (Serverless): This is the core benefit. You can focus entirely on writing business logic, not on managing infrastructure. AWS handles the rest.

2 weeks ago - You can use AWS Lambda to extend other AWS services with custom logic, or create your own backend services. AWS Lambda runs code in response to multiple events, such as HTTP requests via Amazon API Gateway, modifications to objects in Amazon Simple Storage Service (Amazon S3) buckets, table updates in Amazon DynamoDB, and state transitions in AWS Step Functions.

When you invoke a function, you can choose to invoke it synchronously or asynchronously. With synchronous invocation, you wait for the function to process the event and return a response. With asynchronous invocation, Lambda queues the event for processing and returns a response immediately.

3 weeks ago - AWS Lambda is an event-driven, serverless Function as a Service (FaaS) provided by Amazon as a part of Amazon Web Services. It is designed to enable developers to run code without provisioning or managing servers.

July 22, 2024 - AWS Lambda is a serverless compute ... Lambda functions are pieces of code that perform specific tasks, such as processing data streams, responding to HTTP requests, or integrating with other AWS services....

2 days ago - AWS Lambda enables you to write less code and build applications faster through AI-assisted tools and capabilities. The Model Context Protocol (MCP) Server for AWS Lambda enables generative AI models to access and run Lambda functions as tools, allowing secure interaction with private resources ...

AWS Lambda is an event-driven cloud computing service from Amazon Web Services (AWS) that allows developers to run code without having to provision, administer, or manage compute resources.

September 16, 2023 - For now, it’s essential to understand that Lambda is a single function that executes in response to triggers. ... Please note that Lambda supports a wide range of triggers, enabling it to respond to various events and integrate with many AWS services and external systems.

2 weeks ago - AWS Lambda is a serverless, event-driven compute service provided by Amazon Web Services. It lets you run code for virtually any application or backend service without provisioning or managing servers.

November 1, 2022 - Each Lambda function runs in its own container. You can think every lambda function as a standalone docker containers. When a function is created, Lambda packages it into a new container and then executes that container on a multi-region cloud ...

December 25, 2024 - AWS Lambda operates on an event-driven model, meaning it executes code in response to specific triggers or events. The key to Lambda’s functionality is its integration with other AWS services and ability to execute functions on demand.

August 1, 2024 - Lambda passes invocation events into your function, which processes an event and returns its response. ... Runtime allows functions in various languages which runs on the same base execution environment.

You can configure Node.js in Lambda to detect automatically whether a .js file should be treated as CommonJS or as an ES module by adding the —experimental-detect-module flag to the NODE_OPTIONS environment variable. For more information, see Experimental Node.js features. The following examples show function handlers written using both ES modules and CommonJS modules. The remaining examples on this page all use ES modules. ... const url = "https://aws.amazon.com/"; export const handler = async(event) => { try { const res = await fetch(url); console.info("status", res.status); return res.status; } catch (e) { console.error(e); return 500; } };