MCP Stdio Server

MCP Stdio Server is an MCP server that provides local filesystem exploration, mathematical computation, and code inspection capabilities through the standard input and output transport protocol. The server connects to Model Context Protocol compatible clients such as Visual Studio Code and command-line test clients using Node.js. Developers and software engineers use this server to read project configuration and source files, navigate workspace directories, evaluate mathematical expressions, and invoke structured prompt workflows directly from their development environments. It exposes specific project files including documentation and configuration manifests as native MCP resources, ensuring safe local reading. In addition to resources, the server supplies execution tools for calculating arithmetic formulas and listing file tree hierarchies within specified directories. It also includes prompt templates designed for generating code review suggestions and obtaining detailed explanations of code snippets. Because it operates over stdio, the server runs as a local background process requiring no network configuration, facilitating straightforward testing, debugging, and integration across various desktop operating systems including Windows, macOS, and Linux.

Category: Developer Tools & Code Intelligence

Tags: calculator, code-review, filesystem, nodejs, stdio

Visit MCP Stdio Server

How to install and configure MCP Stdio Server

1. Clone the repository and install dependencies by running npm install. 2. Build the TypeScript source files by executing npm run build. 3. Open your client configuration, such as VSCode MCP settings, and register the server under the mcpServers block: json { "mcpServers": { "hjmcp-stdio": { "command": "node", "args": ["dist/server.js"], "cwd": "/absolute/path/to/your/hjmcpstdio/directory", "transport": "stdio" } } } 4. Replace /absolute/path/to/your/hjmcpstdio/directory with the actual path to your cloned project folder. 5. Save the configuration and restart or reload your MCP client.

What you can do with MCP Stdio Server

• Evaluating arithmetic formulas and mathematical expressions directly within an AI coding chat session using the built-in calculate tool. - Inspecting workspace file structures by running the list_files tool with relative directory paths to verify directory contents. - Reading repository documentation and configuration files like package.json as MCP resources to provide accurate context to an LLM. - Requesting structured code reviews for specific repository files by triggering the code-review prompt with optional focus areas. - Generating plain-text explanations of complex programming snippets across various languages using the explain-code prompt template.

Key facts

• Open Source
• https://github.com/hotjoebq/hjmcpstdio
• Developer Tools & Code Intelligence, Files, Documents & PDFs
• calculator, code-review, filesystem, nodejs, stdio

Part of MCP Servers

What can MCP Stdio Server do?

MCP Stdio Server provides tools to perform mathematical calculations and list directory contents. It also exposes project files such as package.json, README.md, and server.ts as readable MCP resources. Additionally, it offers pre-configured prompts for code review suggestions and code explanations.

Which MCP clients work with MCP Stdio Server?

The server works with any MCP-compatible environment that supports stdio transport. It specifically provides setup instructions for Visual Studio Code through its built-in MCP configuration settings. It can also be tested and accessed using the official command-line tool, mcp-cli, or the included simple test client.

How do I install and build MCP Stdio Server?

You install the server by running npm install inside the project root directory, which installs necessary dependencies. After installation, execute npm run build to compile the TypeScript code into JavaScript located in the dist directory before configuring your client to run dist/server.js with Node.js.

Is MCP Stdio Server open source?

Yes, MCP Stdio Server is an open-source project hosted on GitHub. Anyone can inspect the TypeScript source code, contribute modifications, clone the repository, or adapt the server to create custom tools, resources, and prompt templates for their own automated development workflows.

Does MCP Stdio Server require an external network connection?

No, the server operates locally using stdio transport. All tool calls, resource requests, and prompt operations execute directly through local standard input and output streams managed by Node.js on your computer, without sending your project data or expressions over external networks.