MCP Ruby Server Skeleton

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Basic information

About MCP Ruby Server Skeleton

Experimental Ruby implementation of Model Context Protocol (MCP) - A starter server framework for trying out LLM integrations

#mcp #ruby #server #llm #integration

MCP Ruby Server Skeleton config

No standard config provided

This server doesn't expose a parseable MCP config block in its README. See the repository for install instructions.

Repository

MCP Ruby Server Skeleton tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is MCP Ruby Server Skeleton?

The MCP Ruby Server Skeleton is a Ruby implementation of a Model Context Protocol (MCP) server that provides an interface for Large Language Models (LLMs) like Claude to call tools. It is designed for developers who want to build custom MCP servers in Ruby, starting with a built‑in tool that generates random numbers.

How to use MCP Ruby Server Skeleton?

Clone the repository, make the server script executable (chmod +x bin/run_server.rb), then run it directly with ./bin/run_server.rb or integrate it with Claude Desktop by adding a configuration entry to claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/claude_desktop_config.json, Windows: %APPDATA%\Claude\claude_desktop_config.json). After restarting Claude Desktop, you can prompt it to generate a random number.

Key features of MCP Ruby Server Skeleton

Built‑in get-random-number tool (generates random integer between 1 and a specified max)
MCP protocol version 2024‑11‑05 compatibility
JSON‑RPC 2.0 compliant message handling
Detailed logging via STDERR for debugging
Standard I/O transport layer for communication
Extensible architecture for adding custom tools

Use cases of MCP Ruby Server Skeleton

Provide LLMs with a random number generation tool
Serve as a starting template for building custom MCP servers in Ruby
Integrate with Claude Desktop to extend its capabilities
Test and prototype MCP protocol interactions in Ruby

Frequently asked questions

What alternatives exist?

This is a Ruby‑specific MCP server skeleton; similar implementations exist in other languages (e.g., TypeScript). The README is inspired by a TypeScript MCP server article.

What are the runtime requirements?

Ruby 3.0 or later is required.

Where does the server data live?

The server communicates via STDIN/STDOUT and logs to STDERR. Claude Desktop logs are stored locally (macOS: `~/Library/Logs/Claude/mcp*.log`, Windows: `%APPDATA%\Claude\logs\mcp*.log`).

What are the known limitations or common issues?

Server disconnection may occur due to protocol version mismatch, malformed JSON‑RPC messages, improper initialization, or missing file permissions. If the tool does not appear in Claude, check the server registration, script execution permissions, and restart the client.

What transport and authentication are used?

The server uses Standard I/O transport (Stdio) for communication. Authentication is not mentioned in the README; the server is designed for local use with Claude Desktop.

Comments

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