Readonly Filesystem MCP Server

MCP server for filesystem readonly access

Local serverstdio

What is the Readonly Filesystem MCP MCP server?

MCP server for filesystem readonly access. That is what the readonly filesystem mcp mcp server brings to an AI assistant: the same capability, reachable through the Model Context Protocol rather than a separate app or dashboard.

The short version

Node.js server implementing Model Context Protocol (MCP) for readonly filesystem operations. A clone from modelcontextprotocol/server-filesystem.

  • List directories
  • Get file metadata

The tools it exposes

The server publishes 12 tools. What each one is for:

  • read_file — Read complete contents of a file
  • Inputs — - path (string): File path to read
  • read_multiple_files — Read multiple files simultaneously
  • Input — paths (string[])
  • list_directory — List directory contents with [FILE] or [DIR] prefixes
  • search_files — Recursively search for files/directories
  • Case — insensitive matching
  • get_file_info — Get detailed file/directory metadata
  • Returns — - Size
  • Permissionslist_allowed_directories
  • Resources — The Resources tool exposed by this server
  • Tools — The Tools tool exposed by this server

Getting it running

Setup follows the usual MCP pattern — install or clone the server, register it in your client's configuration file, restart the client. The configuration blocks on this page cover the common clients.

How it compares

Among the file and storage access options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Readonly Filesystem MCP's toolset — read_file, Inputs, read_multiple_files and 9 more — is a fair guide to whether it matches your workflow. It is maintained by danielsuguimoto; worth a glance at recent repository activity before you build anything load-bearing on it.

This entry was verified against Readonly Filesystem MCP's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.

Things to watch

  • It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
  • With 12 tools registered it takes up a noticeable share of the context window; turn it off in projects that never touch Readonly Filesystem MCP.
  • Keep per-call confirmation enabled while you learn its behaviour; it is the cheapest safeguard you have.

Available tools

ToolWhat it does
read_fileRead complete contents of a file
Inputs- path (string): File path to read
read_multiple_filesRead multiple files simultaneously
Inputpaths (string[])
list_directoryList directory contents with [FILE] or [DIR] prefixes
search_filesRecursively search for files/directories
Caseinsensitive matching
get_file_infoGet detailed file/directory metadata
Returns- Size
Permissions**list_allowed_directories**
ResourcesThe Resources tool exposed by this server.
ToolsThe Tools tool exposed by this server.

How to install the Readonly Filesystem MCP MCP server

{
  "mcpServers": {
    "filesystem": {
      "command": "npx",
      "args": [
        "-y",
        "@danielsuguimoto/readonly-server-filesystem",
        "/Users/username/Desktop",
        "/path/to/other/allowed/dir"
      ]
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Example prompts to try

  • Use Readonly Filesystem MCP to read file.
  • Use Readonly Filesystem MCP to Inputs.
  • Use Readonly Filesystem MCP to read multiple files.

Frequently asked questions

It connects Readonly Filesystem MCP to MCP-compatible AI assistants such as Claude and Cursor, exposing 12 tools (read_file, Inputs, read_multiple_files, and more) that the assistant can call on your behalf. Instead of copying data back and forth by hand, the assistant works with Readonly Filesystem MCP directly.