Filesystem MCP Server

Filesystem MCP Server

A Model Context Protocol (MCP) server that provides comprehensive file system access and operations. This server allows AI assistants to interact with your file system through a standardized interface.

Features

Resources (Read-only access)

• file://{path} - Read file contents
• directory://{path} - List directory contents with metadata

Tools (File Operations)

• read_file_tool - Read file contents with encoding support
• write_file_tool - Create or overwrite files
• list_directory_tool - List directory contents (recursive option)
• create_directory_tool - Create directories with parent creation
• delete_file_tool - Delete files
• delete_directory_tool - Delete directories (recursive option)
• move_file_tool - Move or rename files/directories
• copy_file_tool - Copy files or directories
• search_files_tool - Search for files by pattern (supports wildcards)
• get_file_info_tool - Get detailed file/directory metadata

Prompts

• analyze_directory_prompt - Template for directory analysis
• find_and_read_prompt - Template for finding and reading files

Security

By default, the server restricts access to your home directory. You can modify the ALLOWED_PATHS list in server.py to change this.

ALLOWED_PATHS = [str(Path.home())]  # Modify this to add more paths

• Access is limited to a configured root directory
• No access to system paths
• User must explicitly grant permissions

Server Versions

server.py - Pure MCP SDK implementation (currently active)

• Uses mcp.server.Server directly
• Better compatibility with Claude Desktop
• Lower-level control

Using with Claude Desktop

To use this server with Claude Desktop, add it to your Claude configuration file.

1. Open your Claude Desktop config file:

• Windows: %APPDATA%\Claude\claude_desktop_config.json

1. Add the server configuration:

{
  "mcpServers": {
    "filesystem": {
      "command": "python",
      "args": ["C:\\Users\\<username>\\filesystem-mcp-server\\server.py"]
    }
  }
}

1. Restart Claude Desktop

Using with MCP Inspector

You can test and debug your server with the MCP Inspector:

npx @modelcontextprotocol/inspector python server.py

Example Usage

Once connected to an MCP client (like Claude Desktop), you can:

List files in a directory

Can you list the files in my Documents folder?

Read a file

Read the contents of C:\Users\<username>\test.txt

Search for files

Find all Python files in my projects directory

Create and write to a file

Create a new file called notes.txt with the content "Hello World"

Get file information

Get detailed information about myfile.pdf

Project Structure

filesystem-mcp-server/
└── src/
    ├── __init__.py
    ├── config.py      ← ALLOWED_PATHS + is_path_allowed()
    ├── tools.py       ← all 10 tool implementations
    ├── tool_schemas.py ← the Tool(...) schema definitions for list_tools()
    ├── resources.py   ← list_resources() + read_resource()
    └── prompts.py     ← list_prompts() + get_prompt()
├── server.py           # Main MCP server implementation
├── requirements.txt    # Python dependencies
├── test_server        # Test file
└── README.md          # This file

Extending the Server

You can easily add more tools by following the existing patterns:

@mcp.tool()
def your_custom_tool(param: str) -> dict:
    """Description of your tool"""
    # Your implementation
    return {"result": "success"}

Troubleshooting

Permission Errors

If you get permission errors, check that the path is within ALLOWED_PATHS in server.py.

Server Not Responding

Check that the server is running with stdio transport and that your client is properly configured.

Requirements

• Python 3.8 or higher
• Windows (adaptable to Linux/macOS by changing path separators)
• MCP Python SDK 1.25 or higher

Resources

• MCP Documentation
• MCP Python SDK
• FastMCP Documentation