AWS Serverless

AWS Serverless is a Claude Code plugin from Amazon Web Services' Agent Plugins for AWS (awslabs/agent-plugins). It bundles seven agent skills for serverless work on AWS, the AWS Serverless MCP Server, and a hook that checks your SAM templates as you edit them. The skills load when a task matches. What its skills cover - AWS Lambda: designing functions and event sources, security, idempotency, limits and troubleshooting - Amazon API Gateway: REST, HTTP and WebSocket APIs, custom domains, Lambda authorizers, throttling, CORS and private APIs, including fixing 4xx, 5xx and CORS errors - Deploying with AWS SAM or the AWS CDK, and serverless CI/CD pipelines - Lambda durable functions: long-running, multi-step workflows with checkpoints, retries, the saga pattern and human-in-the-loop callbacks - Lambda Managed Instances: whether a workload fits, a cost comparison, capacity providers and migrating the code - Lambda MicroVMs: Firecracker-isolated, snapshot-resumable compute for sandboxed or untrusted code - Step Functions state machines with the JSONata query language, including moving over from JSONPath How to install it In Claude Code, run /plugin marketplace add awslabs/agent-plugins, then /plugin install aws-serverless@agent-plugins-for-aws. The repo also packages it as a Codex plugin. How it connects - The AWS Serverless MCP Server runs on your machine with uvx (so you need uv) and uses your local AWS credentials. Check them with aws sts get-caller-identity. - Write access is on by default, so the server can create projects, generate infrastructure code and deploy. Reading Lambda and API Gateway logs stays off unless you add --allow-sensitive-data-access. - Local invokes and container builds need the SAM CLI and a Docker-compatible runtime. The SAM validation hook needs the SAM CLI and jq. Good to know - AWS now recommends its Agent Toolkit for AWS (the AWS Core plugin) for production work. This repo keeps working and accepting contributions. - AWS asks you to review generated code and costs before deploying, and to give your credentials least privilege. - It's open source (Apache-2.0). You pay only for the AWS resources your agent creates.

• “Build a serverless API with Lambda and API Gateway.”

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• “Deploy this app with SAM and set up a CI/CD pipeline.”

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• “Is Lambda Managed Instances right for this workload, and how do the costs compare?”

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• “Build a multi-step order workflow with Lambda durable functions and a human approval step.”

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• “Why is my API Gateway endpoint failing with CORS errors?”

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• “Move this Step Functions state machine from JSONPath to JSONata.”

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