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

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com.mahjonghandbook/mcpv1.0.0 Domain verified

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

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Registry entry

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{
  "_meta": {
    "io.modelcontextprotocol.registry/official": {
      "status": "active",
      "isLatest": true,
      "updatedAt": "2026-11-08T01:23:56.724239Z",
      "publishedAt": "2026-11-08T01:23:56.724239Z",
      "statusChangedAt": "2026-11-08T01:23:56.724239Z"
    }
  },
  "server": {
    "name": "com.mahjonghandbook/mcp",
    "title": "MahjongHandbook — American NMJL, MCR & Riichi Mahjong Scoring Rules Engine",
    "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
    "remotes": [
      {
        "url": "https://mahjonghandbook.com/api/mcp",
        "type": "streamable-http"
      }
    ],
    "version": "1.0.0",
    "repository": {
      "url": "https://github.com/bdodh22/mahjonghandbook-mcp",
      "source": "github"
    },
    "websiteUrl": "https://mahjonghandbook.com",
    "description": "Query American NMJL, Chinese Official MCR (81 Fan) & Japanese Riichi Mahjong scoring rules."
  }
}

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Try it

Call this server's tools from your browser. Nothing to install.

https://mahjonghandbook.com/api/mcp

Requests go through mcptry because browsers can't call most MCP servers directly. Header values are sent to the server for that request only and are never stored or logged.

Tool list from our last check. Connect live to refresh it.

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.

variantstring, required

Mahjong ruleset variant (default: american-nmjl)

This tool isn't marked read-only, so it may change something on the server or in an account you connected.

I understand, run it anyway

Install

Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.

One click: Add to Cursor Add to VS Code Add to LM Studio Add to Goose

Run in a terminal

claude mcp add --transport http mcp https://mahjonghandbook.com/api/mcp

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.

Argument	Type	Description
variant*	string	Mahjong ruleset variant (default: american-nmjl)

Input schema (JSON)

Try it

Call this server's tools from your browser. Nothing to install.

https://mahjonghandbook.com/api/mcp

Requests go through mcptry because browsers can't call most MCP servers directly. Header values are sent to the server for that request only and are never stored or logged.

Tool list from our last check. Connect live to refresh it.

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.

variantstring, required

Mahjong ruleset variant (default: american-nmjl)

This tool isn't marked read-only, so it may change something on the server or in an account you connected.

I understand, run it anyway

Install

Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.

One click: Add to Cursor Add to VS Code Add to LM Studio Add to Goose

Run in a terminal

claude mcp add --transport http mcp https://mahjonghandbook.com/api/mcp

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.

Argument	Type	Description
variant*	string	Mahjong ruleset variant (default: american-nmjl)

Input schema (JSON)

Try it

lookup_mahjong_scoring_rules

Install

Tools (1)

Try it

lookup_mahjong_scoring_rules

Install

Tools (1)

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