fast-filesystem-mcp

<!-- # fast-filesystem-mcp --> <!-- --> Advanced filesystem operations for Claude Desktop with large file handling capabilities and Claude-optimized features.

Add to your Claude Desktop config.

• Basic setup

{
  "mcpServers": {
    "fast-filesystem": {
      "command": "npx",
      "args": ["-y", "fast-filesystem-mcp"]
    }
  }
}

• With backup files enabled

{
  "mcpServers": {
    "fast-filesystem": {
      "command": "npx",
      "args": ["-y", "fast-filesystem-mcp"],
      "env": {
        "CREATE_BACKUP_FILES": "true"
      }
    }
  }
}

Control backup file creation behavior.

• CREATE_BACKUP_FILES=false (default): Disables backup file creation to reduce clutter
• CREATE_BACKUP_FILES=true: Creates backup files before modifications

Note: Backup files are created with timestamps (e.g., file.txt.backup.1755485284402) to prevent data loss during edits.

The MCP server uses a safe logging system that prevents JSON-RPC communication errors.

• DEBUG_MCP=true or MCP_DEBUG=true: Enable debug logging to stderr
• MCP_LOG_FILE=/path/to/log.txt: Write logs to file instead of stderr
• MCP_SILENT_ERRORS=true or SILENT_ERRORS=true: Suppress error messages in responses

Note: Debug output is automatically suppressed by default to prevent JSON parsing errors in Claude Desktop.

To update to the latest version, follow these steps.

1. Uninstall previous version

   npm uninstall -g fast-filesystem-mcp

1. Clean cache and dependencies

   npm cache clean --force
   pnpm store prune

1. Install latest version

   npm i