File Operations MCP Server

A Model Context Protocol (MCP) server that provides enhanced file operation capabilities with streaming, patching, and change tracking support.

Features

• Basic File Operations: Copy, read, write, move, and delete files
• Directory Operations: Create, remove, and copy directories
• File Watching: Monitor files and directories for changes
• Change Tracking: Track and query file operation history
• Streaming Support: Handle large files efficiently with streaming
• Resource Support: Access files and directories through MCP resources
• Progress Reporting: Real-time progress updates for long operations
• Rate Limiting: Protection against excessive requests
• Enhanced Security: Path validation and input sanitization
• Robust Error Handling: Comprehensive error handling and reporting
• Type Safety: Full TypeScript support with strict type checking

Installation

npm install

Usage

Starting the Server

npm start

For development with auto-reloading:

npm run dev

Available Tools

Basic File Operations

• copy_file: Copy a file to a new location
• read_file: Read content from a file
• write_file: Write content to a file
• move_file: Move/rename a file
• delete_file: Delete a file
• append_file: Append content to a file

Directory Operations

• make_directory: Create a directory
• remove_directory: Remove a directory
• copy_directory: Copy a directory recursively (with progress reporting)

Watch Operations

• watch_directory: Start watching a directory for changes
• unwatch_directory: Stop watching a directory

Change Tracking

• get_changes: Get the list of recorded changes
• clear_changes: Clear all recorded changes

Available Resources

Static Resources

• file:///recent-changes: List of recent file system changes

Resource Templates

• file://{path}: Access file contents
• metadata://{path}: Access file metadata
• directory://{path}: List directory contents

Example Usage

// Copy a file
await fileOperations.copyFile({
    source: 'source.txt',
    destination: 'destination.txt',
    overwrite: false
});

// Watch a directory
await fileOperations.watchDirectory({
    path: './watched-dir',
    recursive: true
});

// Access file contents through resource
const resource = await mcp.readResource('file:///path/to/file.txt');
console.log(resource.contents[0].text);

// Copy directory with progress tracking
const result = await fileOperations.copyDirectory({
    source: './source-dir',
    destination: './dest-dir',
    overwrite: false
});
// Progress token in result can be used to track progress
console.log(result.progressToken);

Rate Limits

The server implements rate limiting to prevent abuse:

• Tools: 100 requests per minute
• Resources: 200 requests per minute
• Watch Operations: 20 operations per minute

Rate limit errors include a retry-after period in the error message.

Security Features

Path Validation

All file paths are validated to prevent directory traversal attacks:

• No parent directory references (../)
• Proper path normalization
• Input sanitization

Resource Protection

• Rate limiting on all operations
• Proper error handling and logging
• Input validation on all parameters
• Safe resource cleanup

Progress Reporting

Long-running operations like directory copying provide progress updates:

interface ProgressUpdate {
    token: string | number;
    message: string;
    percentage: number;
}

Progress can be tracked through the progress token returned in the operation result.

Development

Building

npm run build

Linting

npm run lint

Formatting

npm run format

Testing

npm test

Configuration

The server can be configured through various settings:

• Rate Limiting: Configure request limits and windows
• Progress Reporting: Control update frequency and detail level
• Resource Access: Configure resource permissions and limits
• Security Settings: Configure path validation rules
• Change Tracking: Set retention periods and storage options
• Watch Settings: Configure debounce times and recursive watching

Error Handling

The server provides detailed error information through the FileOperationError class and MCP error codes:

Standard MCP Error Codes

• InvalidRequest: Invalid parameters or request format
• MethodNotFound: Unknown tool or resource requested
• InvalidParams: Invalid parameters (e.g., path validation failure)
• InternalError: Server-side errors

Custom Error Types

• File operation failures
• Rate limit exceeded
• Path validation errors
• Resource access errors

Each error includes:

• Specific error code
• Detailed error message
• Relevant metadata (file paths, limits, etc.)
• Stack traces in development mode

Contributing

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

License

This project is licensed under the MIT License - see the LICENSE file for details.