Filesystem MCP

local MCP server

Installation

Terminal

claude mcp add io-github-j0hanz-filesystem-mcp -e FS_ALLOWED_DIRS=... -- npx -y @j0hanz/filesystem-mcp

Run in your project folder. Add --scope user to use it everywhere.

Claude Desktop, Cursor & other clients

Add to claude_desktop_config.json or .cursor/mcp.json.

{
  "mcpServers": {
    "io-github-j0hanz-filesystem-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@j0hanz/filesystem-mcp"
      ],
      "env": {
        "FS_ALLOWED_DIRS": "..."
      }
    }
  }
}

Fill in the environment variables with your own credentials.

Summary

Secure filesystem MCP server for reading, writing, searching, diffing, and patching files.

Questions

Filesystem MCP is a local MCP server distributed as the npm package @j0hanz/filesystem-mcp.

Run: claude mcp add io-github-j0hanz-filesystem-mcp -e FS_ALLOWED_DIRS=... -- npx -y @j0hanz/filesystem-mcp

Run: codex mcp add io-github-j0hanz-filesystem-mcp --env FS_ALLOWED_DIRS=... -- npx -y @j0hanz/filesystem-mcp

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