janken-mcp-server.js

What is janken-mcp-server.js?

janken-mcp-server.js is a simple HTTP server that provides a "janken" (rock-paper-scissors) game using the Model Context Protocol (MCP). It returns a random choice of グー, チョキ, or パー in response to MCP-formatted requests.

How to use janken-mcp-server.js?

Clone the repository, navigate to its directory, and start the server with node janken-mcp-server.js. It listens on http://localhost:3000 by default. Send a POST request with a JSON body containing {"query": "じゃんけん"} to receive a random hand.

Key features of janken-mcp-server.js

• Implements the MCP request/response protocol
• Randomly selects グー, チョキ, or パー
• CORS‑enabled for cross‑origin requests
• Lightweight and simple to run

Use cases of janken-mcp-server.js

• Demonstrating a basic MCP server implementation
• Adding a random rock‑paper‑scissors tool to an MCP‑compatible client
• Testing or prototyping MCP protocol interactions

FAQ from janken-mcp-server.js

What does the server return?

It returns a JSON object with a result field containing the chosen hand (e.g., "グー") and a metadata object with the same choice.

How do I send a request to the server?

Send a POST request to http://localhost:3000 with Content-Type: application/json and a body like {"query": "じゃんけん"}.

What runtime does the server require?

The server runs on Node.js and is started with the command node janken-mcp-server.js.

Does janken-mcp-server.js support authentication or transport security?

The README does not mention authentication, TLS, or any transport‑level security.

What are the server's dependencies?

The README lists no additional dependencies beyond Node.js itself.