-
securityA
license-
qualityA VS Code extension provides a MCP server that exposes Roslyn language features. It enables tools like find usages, go to definition, quick info, etc.
Last updated -
176
AGPL 3.0
Used as the backend server technology for the MCP server, providing HTTP and SSE (Server-Sent Events) capabilities
Detected as a global tool to provide documentation through the MCP server
Detected as a global tool and used to discover package scripts to provide documentation through the MCP server
Detected as a global tool and used to discover package scripts to provide documentation through the MCP server
Used for building the WebView panel frontend of the extension
Detected as a global tool and used to discover package scripts to provide documentation through the MCP server
MCP Tools Documentation
A VSCode/Cursor extension that provides an integrated MCP server and UI panel for retrieving and displaying command-line tool documentation. The extension automatically detects tools in your workspace and provides their documentation through a WebView panel.
Core Features
🔄 Built-in MCP Server
Express + SSE server (ports 54321-54421)
Secure origin validation
Automatic port selection
Connection management and cleanup
Real-time event streaming
🔍 Tool Discovery
Package scripts (npm, yarn, pnpm)
Local binaries (node_modules/.bin)
Global tools (git, npm, yarn, pnpm)
Monorepo workspace support
📚 Documentation Retrieval
Help command execution (-h, --help)
Version information fetching
Secure command validation
Error handling
💻 VS Code Integration
React-based WebView panel
Status bar integration
Command palette support
Workspace path detection
Architecture
1. VS Code Extension (Backend)
Extension Host (src/extension.ts)
├── Activates when VS Code starts
├── Creates MCP Server
│ └── Express + SSE Server (54321-54421 port range)
└── Creates WebView Panel
2. MCP Server (Middle Layer)
MCP Server (src/server/*)
├── SSE Event Stream
│ ├── Real-time tool discovery updates
│ ├── Documentation streaming
│ └── Connection state management
│
└── Tool Discovery System
├── path-scanner.ts
│ └── Finds tools in workspace (bin/, node_modules/.bin)
└── package-scanner.ts
└── Scans package.json for available tools
3. WebView Panel (Frontend)
React WebView (src/panel/*)
├── UI Components
│ └── Shows available tools and their docs
│
└── SSE Client
├── Requests available tools
└── Streams tool documentation
Project Structure
my-tools-mcp/
├── src/ # Source code
│ ├── extension.ts # Extension entry point
│ ├── env.ts # Environment configuration
│ ├── server/ # Built-in MCP server
│ │ ├── index.ts # Server setup and SSE handling
│ │ └── controllers/ # Tool discovery and execution
│ │ ├── docs/ # Documentation controllers
│ │ ├── path-scanner.ts # Tool discovery
│ │ └── package-scanner.ts # Package.json scanning
│ ├── panel/ # WebView UI (React)
│ │ ├── index.tsx # WebView entry point
│ │ ├── App.tsx # Main React component
│ │ └── components/ # UI components
│ ├── types/ # Shared TypeScript types
│ └── lib/ # Shared utilities
├── dist/ # Compiled output
└── src/__tests__/ # Test files
Development Setup
Install dependencies:
pnpm install
Start development:
# Start webpack in watch mode
pnpm run dev
# Or build for production
pnpm run build
Launch the extension:
Press F5 in VSCode to start debugging
The extension will start both the MCP server and WebView panel
Usage
Open the command palette (Cmd/Ctrl + Shift + P)
Type "MCP Tools" and select the command
The WebView panel will open and display available tools
Select a tool to view its documentation
Technical Details
Tool Discovery
Package Scripts
Automatically detects npm/yarn/pnpm scripts
Shows script source and working directory
Supports monorepo workspaces
Validates script existence
Binary Tools
Finds tools in node_modules/.bin
Detects global tools (git, npm, yarn, pnpm)
Validates tool existence and permissions
Handles path resolution
Documentation Retrieval
Executes help commands (-h, --help)
Fetches version information
Handles command execution errors
Validates tool names and arguments
Implements proper timeouts
SSE Communication
Real-time tool discovery updates
Secure origin validation
Connection management and cleanup
Error handling and reporting
Automatic reconnection support
Event-based streaming
Bi-directional message passing
Security Features
Tool name validation
Command injection prevention
Origin validation for SSE connections
Proper error handling and reporting
Resource cleanup
Connection state management
Testing
The extension includes comprehensive tests:
Integration tests for server functionality
VS Code extension tests
Tool discovery tests
Security validation tests
SSE communication tests
License
ISC
This server cannot be installed
local-only server
The server can only run on the client's local machine because it depends on local resources.
Facilitates real-time tool discovery and documentation retrieval for command-line tools within a VSCode extension, using Express and SSE for secure and dynamic content streaming.
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