MCP Stdio Server

An MCP server using stdio transport, offering file system access, a calculator, and a code review tool. Requires Node.js.

A complete Model Context Protocol (MCP) server implementation using stdio transport that showcases:

- Resources: File system access to read project files (README.md, package.json, src/server.ts)
- Tools: Calculator for mathematical operations and file listing
- Prompts: Code review and code explanation assistants

- MCP server with stdio transport
- File reading resources for project files
- Mathematical calculator tool
- Directory listing tool
- Code review and explanation prompt templates
- VSCode integration ready
- Test client for basic functionality testing

Option 1: Basic Functionality Test (No Additional Tools Required)

This runs a simple client that tests basic MCP communication with the server.

Option 2: Comprehensive Testing (Requires mcp-cli Installation)

npm install -g @modelcontextprotocol/cli

# Set the MCP configuration export MCP_CLI_CONFIG_PATH=$(pwd)/mcp_config.json # On Windows Command Prompt, use: set MCP_CLI_CONFIG_PATH=%cd%\mcp_config.json # List available tools mcp-cli tool list --server hjmcp-stdio # Test calculator tool mcp-cli tool call calculate --server hjmcp-stdio --input '{"expression": "2 + 3  4"}' # Test file listing tool mcp-cli tool call list_files --server hjmcp-stdio --input '{"directory": "."}' # Test resource reading mcp-cli tool read file://package.json --server hjmcp-stdio

{ "mcpServers": { "hjmcp-stdio": { "command": "node", "args": ["dist/server.js"], "cwd": "/absolute/path/to/your/hjmcpstdio/directory", "transport": "stdio" } } }

- Input:{"expression": "mathematical expression"}
- Example:{"expression": "2 + 3 4"}

- Input:{"directory": "relative path"}(optional, defaults to ".")
- Example:{"directory": "src"}

- code-review- Get code review suggestions

- Arguments:file_path(required),focus_areas(optional)

- Arguments:code_snippet(required),language(optional)

- src/server.ts- Main MCP server implementation
- src/simple-client.ts- Basic test client
- mcp_config.json- MCP CLI configuration for testing
- package.json- Project configuration and dependencies
- tsconfig.json- TypeScript configuration

- Usenpm run test-simplefor basic functionality verification

Comprehensive Testing (Requires mcp-cli):

- Install mcp-cli globally:npm install -g @modelcontextprotocol/cli
- Use mcp-cli commands for detailed tool and resource testing

- Add server configuration to VSCode MCP settings
- VSCode handles MCP communication automatically

- ✅ Tool functionality (calculate, list_files)
- ✅ Resource reading (package.json confirmed working)
- ✅ Stdio transport communication
- ✅ MCP protocol compliance
- ✅ Cross-platform compatibility (Windows, macOS, Linux)

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