mcp-on-lambda

# Streamable MCP Demo on AWS Lambda with IAM Protected Lambda URL This repo is mainly based on the article https://community.aws/content/2vzj07Wyk6Lw281Tvs1Lw7kJJNW/building-scalable-mcp-servers-on-aws-lambda-a-practical-guide with following improvement: 1. The SAM deployment provisions the Lambda function URL that is protected by AWS IAM. 2. The MCP client can use the new [**AWSIAMTransport** class](./mcp-function/src/transport/AWSIAMTransport.ts) to call the protected Lambda function URL. This class extends the default MCP typescript **StreamableHTTPClientTransport** by automatically sign the HTTP request with [AWS Signature Version 4 for API requests](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_sigv.html). (by default use the local AWS credential, but you can use any AWS credential/role)