Filesystem (Rust)

rs_filesystem: MCP Rust Filesystem tools

rs_filesystem is a simple set of filesystem tools that can be used in Claude desktop or any other MCP client.

CLI options

• --mcp: Enable MCP server
• --resources: display resources
• --prompts: display prompts
• --tools: display tools

How to use MCP CLI server in Claude Desktop?

1. Edit claude_desktop_config.json: Claude Desktop -> Settings -> Developer -> Edit Config
2. Add the following configuration to the servers section:

{
   "mcpServers": {
      "rs_filesystem": {
         "command": "/path/to/rs_filesystem",
         "args": [
            "--mcp"
         ],
         "env": {
            "MCP_RS_FILESYSTEM_ALLOWED_DIRECTORIES": "/path/number/one:/path/number/two"
         }
      }
   }
}

Make sure you use the actual path to the rs_filesystem binary. Make sure the MCP_RS_FILESYSTEM_ALLOWED_DIRECTORIES env variable is set to a colon-separated list of allowed directories. The tools will only work inside those directories.

If you want to check MCP log, please use tail -n 20 -f ~/Library/Logs/Claude/rs_filesystem.logs.jsonl.

References

• MCP Specification: https://spec.modelcontextprotocol.io/
• Model Context Protocol (MCP): https://modelcontextprotocol.io/introduction
• rpc-router: json-rpc routing library - https://github.com/jeremychone/rust-rpc-router/
• Zed context_server: https://github.com/zed-industries/zed/tree/main/crates/context_server