Filesystem MCP Server

What is Filesystem MCP Server?

A secure Model Context Protocol (MCP) server that provides a standardized interface for interacting with the local filesystem. It allows clients to perform common file operations such as listing directories, reading files, and searching file contents in a controlled manner, with all operations constrained to configurable allowed directories for security.

How to use Filesystem MCP Server?

Build the server using Cargo (cargo build --release), then run the binary with optional flags: --allowed-dirs for comma-separated directory paths, --config-file for a file listing directories, or --max-file-size to limit file reads. Environment variables (FS_ALLOWED_DIRS, FS_CONFIG_FILE, FS_MAX_FILE_SIZE, FS_REQUEST_TIMEOUT, FS_LOG_LEVEL, FS_LOG_FILE) can also configure the server.

Key features of Filesystem MCP Server

• Provides 11 MCP tools including list, read, write, mkdir, delete, copy, move, info, search, edit, and list_allowed_dirs.
• All operations are constrained to configurable allowed directories for security.
• Supports partial file edits via replace, insert, delete, and replace_lines operations.
• Search functionality supports regex, glob file patterns, recursive search, and context lines.
• Configurable via command-line flags, configuration files, or environment variables.
• Built with Rust for performance and reliability.

Use cases of Filesystem MCP Server

• Allow AI assistants to securely read and write files within designated project directories.
• Automate batch file operations like search-and-replace across multiple files.
• Provide controlled filesystem access for MCP-based tools and workflows.