MCP Lambda Server MCP Server

An AWS Serverless Application Model that operates as an MCP server via serverless AWS resources. Exposed over MCP by the mcp lambda server mcp server, that capability becomes something an assistant can invoke while it works, not something you go and do afterwards.

What it actually does

Model Context Protocol (MCP) implementation using AWS Lambda and SAM.

This project provides a serverless implementation of the Model Context Protocol, with two distinct interfaces:

Adding it to your client

The server ships on npm as @markvp/mcp-lambda-sam, so your MCP client can launch it on demand — there is no separate build step. Add the server block to your client's configuration, restart it, and the tools register themselves.

Its toolset

Everything the assistant can do here goes through one of these:

• Deployment — The command will interactively prompt for administrative configuration: - Stack name (for multiple instances) - AWS Region - VPC configuration
• Troubleshooting — 1. Connection Issues: - Verify AWS credentials - Check IAM permissions - Ensure network connectivity

Configuration

You will need one environment variable: REGISTRATION_URL. The server will not start without them, which is usually why the tools fail to appear on a first run. Keep credentials in your client's env block or a secrets manager rather than in a file you might commit.

• AWS CLI installed and configured - AWS SAM CLI installed - Node.js 20.x or later - An AWS account with permissions to create: - Lambda functions - DynamoDB tables - IAM roles - SQS queues

Caveats

• It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
• Missing credentials fail quietly in some clients — if no tools show up, check the environment block first.
• MCP clients confirm each tool call by default. Leave that on until you have watched what the mcp lambda server mcp server does with a few real requests.

When to reach for it

This sits in the cloud and infrastructure group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. MCP Lambda Server's toolset — Deployment, Troubleshooting — is a fair guide to whether it matches your workflow. It is maintained by markvp; worth a glance at recent repository activity before you build anything load-bearing on it.

We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.