Aws MCP Server

Easy and powerful mocking of AWS SDK v3 Clients. The aws mcp server wraps that behind the Model Context Protocol, so an assistant can use it through 5 defined tools rather than through you.

What it actually does

Library recommended by the AWS SDK for JavaScript team - see the introductory post on the AWS blog.

The AWS SDK for JavaScript version 3, is the new version of SDK to use in Node.js and browser. It comes with modular architecture and improved typing, thanks to being written in TypeScript.

Its toolset

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

• Import — The Import tool exposed by this server
• Mock — Create mock for all instances or for given instance of the AWS SDK Client:
• Inspect — Get calls of a specified command with given payload (you can force strict matching by passing third param strict: true):
• Jest — Custom Jest matchers simplify verification that the mocked Client was called with given Commands
• Vitest — // a PublishCommand was sent to SNS expect(snsMock).toHaveReceivedCommand(PublishCommand);

Adding it to your client

Setup follows the usual MCP pattern — install or clone the server, register it in your client's configuration file, restart the client.

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. Aws's toolset — Import, Mock, Inspect and 2 more — is a fair guide to whether it matches your workflow. It is maintained by m-radzikowski; 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We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.

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.
• MCP clients confirm each tool call by default. Leave that on until you have watched what the aws mcp server does with a few real requests.