MahjongHandbook — American NMJL, MCR & Riichi Mahjong Scoring Rules Engine

com.mahjonghandbookPublished by mahjonghandbook.comOfficial publisherv1.0.0Updated Nov 8, 2026

Query American NMJL, Chinese Official MCR (81 Fan) & Japanese Riichi Mahjong scoring rules.

VerifiedStreamable HTTPWeb executable

Overview

AI-generated overview

A remote MCP server that lets an assistant look up American NMJL, Chinese Official MCR and Japanese Riichi mahjong scoring rules.

What you can do
  • Look up official scoring rules for three mahjong variants: American Mahjong (NMJL), Chinese Official (MCR) and Japanese Riichi.
  • Retrieve minimum winning requirements, Joker and Dora usage, and Fan/Han scoring patterns for a given hand or rule question.
When to use it
Useful when you want an assistant to answer mahjong rules and scoring questions, check whether a hand meets a variant's minimum requirements, or compare scoring patterns across the three rule systems.
Requirements
A remote streamable HTTP endpoint; no package, account, API key or environment variable is declared.

Installation

In SourceWeft

  1. Open MahjongHandbook — American NMJL, MCR & Riichi Mahjong Scoring Rules Engine in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/com.mahjonghandbook%2Fmcp/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "mahjonghandbook-american-nmjl-mcr-riichi": {
      "type": "http",
      "url": "https://mahjonghandbook.com/api/mcp"
    }
  }
}

README

This repository has no README.

Tools

1

lookup_mahjong_scoring_rules

Look up official rules, minimum winning requirements, Joker/Dora usage, and Fan/Han scoring patterns across American Mahjong (NMJL), Chinese Official (MCR), and Japanese Riichi Mahjong.

Parametersvariantrequired

Version history

1
  1. v1.0.0LatestNov 8, 2026

Score

75% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • License10 pts

    Declare a license in the repository or the registry entry.