MCP File Tools

Claude sees Настройки — not ???? or Íàñòðîéêè.

MCP server for file operations with non-UTF-8 encoding support. Auto-detects and converts 24 encodings (Cyrillic, Windows-125x, ISO-8859, KOI8, UTF-16, GBK/GB18030) so AI assistants can read and write legacy files without corrupting data.

Perfect for: Delphi/Pascal projects, legacy VB6 apps, old PHP/HTML sites, config files with non-UTF-8 text.

What It Does

Provides 21 tools for file operations with automatic encoding conversion:

• read_text_file - Read files with encoding auto-detection and conversion
• read_multiple_files - Read multiple files concurrently with encoding support
• write_file - Write files in specific encodings
• edit_file - Line-based edits with diff preview and whitespace-flexible matching
• copy_file - Copy a file to a new location
• delete_file - Delete a file
• list_directory - Browse directories with pattern filtering
• tree - Compact indented tree view (85% fewer tokens than JSON)
• directory_tree - Get recursive tree view as JSON (deprecated, use tree)
• search_files - Recursively search for files matching glob patterns
• grep_text_files - Regex search in file contents with encoding support
• detect_encoding - Auto-detect file encoding with confidence score
• convert_encoding - Convert file between encodings
• detect_line_endings - Detect line ending style (CRLF/LF/mixed)
• change_line_endings - Convert line endings to LF or CRLF
• manage_bom - Detect, strip, or add Unicode BOM
• list_encodings - Show all supported encodings
• get_file_info - Get file/directory metadata
• create_directory - Create directories recursively (mkdir -p)
• move_file - Move or rename files and directories
• list_allowed_directories - Show accessible directories

Supported encodings (22 total):

• Unicode: UTF-8, UTF-16 LE, UTF-16 BE (with BOM detection for UTF-16 and UTF-32)
• Cyrillic: Windows-1251, KOI8-R, KOI8-U, CP866, ISO-8859-5
• Western European: Windows-1252, ISO-8859-1, ISO-8859-15
• Central European: Windows-1250, ISO-8859-2
• Greek: Windows-1253, ISO-8859-7
• Turkish: Windows-1254, ISO-8859-9
• Other: Hebrew (1255), Arabic (1256), Baltic (1257), Vietnamese (1258), Thai (874)

See TOOLS.md for detailed parameters and examples.

Security: All operations restricted to allowed directories only.

Installation

Claude Code plugin (recommended)

The simplest way to use this with Claude Code:

/plugin marketplace add dimitar-grigorov/mcp-file-tools
/plugin install mcp-file-tools

On first launch the plugin downloads the right binary for your OS, verifies its SHA-256, caches it, and keeps it pinned to a known version. The server is automatically scoped to the folder you have open (via the MCP roots protocol), so there is nothing to configure. It needs nothing beyond Claude Code itself; the launcher runs on Node, which Claude Code already uses, so it works the same on Windows, macOS, and Linux.

The plugin only accesses your current workspace. To grant access to directories outside it, use a manual install (below).

Already added the server the manual way? Remove the old claude mcp add entry so you are not running two copies:

claude mcp remove file-tools

Updating the plugin

claude plugin marketplace update mcp-file-tools
claude plugin update mcp-file-tools@mcp-file-tools

Use the full plugin@marketplace id, not the bare name. Or enable auto-update in /plugin → Marketplaces.

MCP Registry

This server is listed in the Official MCP Registry for discovery by any MCP client.

Manual install (other MCP clients, or access outside your workspace)

Download the binary for your platform, then register it with the directories it may access.

Platform	Release asset	Suggested path
Windows x64	mcp-file-tools_windows_amd64.exe	%LOCALAPPDATA%\Programs\mcp-file-tools\mcp-file-tools.exe
Linux x64	mcp-file-tools_linux_amd64	~/.local/bin/mcp-file-tools
macOS ARM64	mcp-file-tools_darwin_arm64	~/.local/bin/mcp-file-tools

Windows (PowerShell, not CMD):

mkdir -Force "$env:LOCALAPPDATA\Programs\mcp-file-tools"
iwr "https://github.com/dimitar-grigorov/mcp-file-tools/releases/latest/download/mcp-file-tools_windows_amd64.exe" -OutFile "$env:LOCALAPPDATA\Programs\mcp-file-tools\mcp-file-tools.exe"
claude mcp add --scope user file-tools -- "$env:LOCALAPPDATA\Programs\mcp-file-tools\mcp-file-tools.exe" "D:\Projects"

Linux / macOS (swap the asset name from the table for your platform):

mkdir -p ~/.local/bin
curl -L "https://github.com/dimitar-grigorov/mcp-file-tools/releases/latest/download/mcp-file-tools_linux_amd64" -o ~/.local/bin/mcp-file-tools
chmod +x ~/.local/bin/mcp-file-tools
claude mcp add --scope user file-tools -- ~/.local/bin/mcp-file-tools ~/Projects

Go install (all platforms)

# Requires Go 1.26+
go install github.com/dimitar-grigorov/mcp-file-tools/cmd/mcp-file-tools@latest
# Linux / macOS
claude mcp add --scope user file-tools -- $(go env GOPATH)/bin/mcp-file-tools ~/Projects

# Windows PowerShell
claude mcp add --scope user file-tools -- "$(go env GOPATH)\bin\mcp-file-tools.exe" "D:\Projects"

Other Clients

For Claude Desktop, VSCode, or Cursor, use the downloaded binary path in your config:

Claude Desktop (%APPDATA%\Claude\claude_desktop_config.json on Windows, ~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

Windows:

{
  "mcpServers": {
    "file-tools": {
      "command": "C:\\Users\\YOUR_NAME\\AppData\\Local\\Programs\\mcp-file-tools\\mcp-file-tools.exe",
      "args": ["D:\\Projects", "C:\\Users\\YOUR_NAME\\Documents"]
    }
  }
}

macOS / Linux:

{
  "mcpServers": {
    "file-tools": {
      "command": "/Users/YOUR_NAME/.local/bin/mcp-file-tools",
      "args": ["/Users/YOUR_NAME/Projects", "/Users/YOUR_NAME/Documents"]
    }
  }
}

The args array specifies allowed directories the server can access. Add as many directories as you need.

VSCode / Cursor (Claude Code extension)

If you already ran claude mcp add --scope user from the installation steps above, the server is already available in VSCode — no extra config needed.

To configure separately for VSCode only:

claude mcp add --scope user file-tools -- "%LOCALAPPDATA%\Programs\mcp-file-tools\mcp-file-tools.exe" "D:\Projects"

Alternatively, create a per-project config by adding .mcp.json to your project root:

{
  "mcpServers": {
    "file-tools": {
      "type": "stdio",
      "command": "C:\\Users\\YOUR_NAME\\AppData\\Local\\Programs\\mcp-file-tools\\mcp-file-tools.exe",
      "args": ["D:\\Projects", "D:\\Other\\Directory"]
    }
  }
}

Note: The type: "stdio" field is required. The args array specifies allowed directories — the VSCode extension does not automatically add the workspace directory, so you must list all directories you want to access. To add more directories later, re-run the claude mcp add command with all directories listed (it overwrites the previous config).

OpenAI Codex CLI

Codex does not have an mcp add command -- you need to edit ~/.codex/config.toml manually.

Windows (PowerShell):

# Download
mkdir -Force "$env:LOCALAPPDATA\Programs\mcp-file-tools"
iwr "https://github.com/dimitar-grigorov/mcp-file-tools/releases/latest/download/mcp-file-tools_windows_amd64.exe" -OutFile "$env:LOCALAPPDATA\Programs\mcp-file-tools\mcp-file-tools.exe"

Then add to ~/.codex/config.toml:

[mcp_servers.file-tools]
command = "C:\\Users\\YOUR_NAME\\AppData\\Local\\Programs\\mcp-file-tools\\mcp-file-tools.exe"
args = ["D:\\Projects"]

Auto-approve All Tools (Claude Code)

To skip permission prompts for all file-tools commands, create .claude/settings.local.json in your project root:

{
  "permissions": {
    "allow": [
      "Bash(ls *)",
      "Bash(grep *)",
      "Bash(sort *)",
      "Bash(wc *)",
      "Bash(find *)",
      "Bash(echo *)",
      "Grep",
      "Glob",
      "WebSearch",
      "mcp__file-tools__read_text_file",
      "mcp__file-tools__read_multiple_files",
      "mcp__file-tools__write_file",
      "mcp__file-tools__edit_file",
      "mcp__file-tools__copy_file",
      "mcp__file-tools__list_directory",
      "mcp__file-tools__tree",
      "mcp__file-tools__directory_tree",
      "mcp__file-tools__search_files",
      "mcp__file-tools__grep_text_files",
      "mcp__file-tools__detect_encoding",
      "mcp__file-tools__convert_encoding",
      "mcp__file-tools__detect_line_endings",
      "mcp__file-tools__change_line_endings",
      "mcp__file-tools__manage_bom",
      "mcp__file-tools__list_encodings",
      "mcp__file-tools__get_file_info",
      "mcp__file-tools__create_directory",
      "mcp__file-tools__list_allowed_directories",
      "mcp__file-tools__check_for_updates"
    ]
  }
}

This auto-approves safe read-only and editing file-tools operations plus common shell commands and web search. Destructive operations (delete_file, move_file) and WebFetch are intentionally excluded — Claude will ask before using them. Adjust to your needs.

Update

The server checks for updates automatically and notifies you through tool responses when a newer version is available. To update:

1. Close all Claude Code sessions (the binary is locked while running)
2. Re-download the binary:

iwr "https://github.com/dimitar-grigorov/mcp-file-tools/releases/latest/download/mcp-file-tools_windows_amd64.exe" `
    -OutFile "$env:LOCALAPPDATA\Programs\mcp-file-tools\mcp-file-tools.exe"

To disable update checks, set the environment variable MCP_NO_UPDATE_CHECK=1.

Verify & Uninstall

# Check which file-tools server is connected (plugin or manual)
claude mcp list

# Remove a manual install
claude mcp remove file-tools

# Remove the plugin
claude plugin uninstall mcp-file-tools

How to Use

Once installed, just ask Claude:

• "List all .pas files in this directory"
• "Read config.ini and detect its encoding"
• "Show all supported encodings"
• "Read MainForm.dfm using CP1251 encoding"

Security: The server only accesses directories you explicitly allow:

• Automatic: Claude Desktop/Code provide workspace directories automatically
• Manual: Specify directories in config args: ["/path/to/project"]

Configuration

The server can be configured via environment variables:

Variable	Description	Default
MCP_DEFAULT_ENCODING	Default encoding for write_file when none specified	cp1251
MCP_MEMORY_THRESHOLD	Memory threshold in bytes. Files smaller are loaded into memory for faster I/O; larger files use streaming. Also affects encoding detection mode.	67108864 (64MB)

To override, set environment variables in your config (Claude Desktop example):

{
  "mcpServers": {
    "file-tools": {
      "command": "C:\\Users\\YOUR_NAME\\AppData\\Local\\Programs\\mcp-file-tools\\mcp-file-tools.exe",
      "args": ["D:\\Projects"],
      "env": {
        "MCP_DEFAULT_ENCODING": "utf-8"
      }
    }
  }
}

Use Cases

Legacy Codebases

Many legacy projects use non-UTF-8 encodings that AI assistants can't handle natively:

• Delphi/Pascal (Windows-1251): Source files with Cyrillic UI text
• Visual Basic 6 (Windows-1252): Forms and config files with Western European characters
• Legacy PHP/HTML (CP1251, ISO-8859-1): Web apps with localized content
• Old config files (Various): INI, properties, registry files with legacy encodings

How it works:

User: Read config.ini and change the title to "Настройки"
Assistant: [read_text_file with cp1251] → [modify UTF-8] → [write_file with cp1251]

The original encoding is preserved - files remain compatible with legacy tools.

Development

Prerequisites: Go 1.26+

# Run tests
go test ./...

# Build
go build -o mcp-file-tools ./cmd/mcp-file-tools

Debugging with MCP Inspector

MCP Inspector provides a web UI for testing MCP servers.

Prerequisites: Node.js v18+

# Run with allowed directory (required)
npx @modelcontextprotocol/inspector go run ./cmd/mcp-file-tools -- /path/to/allowed/dir

# Or with built binary
npx @modelcontextprotocol/inspector ./mcp-file-tools.exe C:\Projects

Opens a browser where you can view tools, call them with custom arguments, and inspect responses.

Manual Debugging

Run the server with an allowed directory and send JSON-RPC commands via stdin:

# Specify allowed directory
go run ./cmd/mcp-file-tools /path/to/project

Example commands (paste into terminal):

{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}
{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"list_directory","arguments":{"path":"/path/to/project","pattern":"*.go"}}}
{"jsonrpc":"2.0","id":3,"method":"tools/call","params":{"name":"read_text_file","arguments":{"path":"/path/to/project/main.pas","encoding":"cp1251"}}}
{"jsonrpc":"2.0","id":4,"method":"tools/call","params":{"name":"detect_encoding","arguments":{"path":"/path/to/project/file.txt"}}}

License

GPL-3.0 - see LICENSE