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

com.mahjonghandbook/mcpVersion 1.0.2

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

Status

Responds135 msNov 14, 2026, 14:05 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 14:05 UTC
Latency: 135 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://mahjonghandbook.com/api/mcpResponds135 msNov 14, 2026, 14:05 UTC

No sign-in

Claude Code

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

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: mahjonghandbook
Remote MCP server URL: https://mahjonghandbook.com/api/mcp

Cursor

{
  "mcpServers": {
    "mahjonghandbook": {
      "url": "https://mahjonghandbook.com/api/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"mahjonghandbook","type":"http","url":"https://mahjonghandbook.com/api/mcp"}'

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Tools

4 tools

Tools of MahjongHandbook — American NMJL, MCR & Riichi Mahjong Scoring Rules Engine
	Description		Read-only	Idempotent	Open world
`check_nmjl_joker_legality`Validate whether an American Mahjong Joker tile can legally substitute inside a specific meld size (1 to 6 tiles) and retrieve exposed Joker live-turn swap rules.	Validate whether an American Mahjong Joker tile can legally substitute inside a specific meld size (1 to 6 tiles) and retrieve exposed Joker live-turn swap rules.	No	Yes	Yes	No
`check_riichi_furiten_and_yaku`Evaluate Japanese Riichi Mahjong discard/temporary Furiten Ron restrictions and verify whether a hand satisfies the mandatory 1-Yaku win condition independent of Dora.	Evaluate Japanese Riichi Mahjong discard/temporary Furiten Ron restrictions and verify whether a hand satisfies the mandatory 1-Yaku win condition independent of Dora.	No	Yes	Yes	No
`lookup_american_charleston_sequence`Retrieve exact pre-game tile passing directions (Right, Across, Left), blind pass rules, and Courtesy Pass negotiation steps prior to the first discard in American Mahjong.	Retrieve exact pre-game tile passing directions (Right, Across, Left), blind pass rules, and Courtesy Pass negotiation steps prior to the first discard in American Mahjong.	No	Yes	Yes	No
`lookup_mahjong_scoring_rules`Compare high-level regional ruleset structures (tile deck size 136 vs 144 vs 152, hand length, and minimum Fan/point entry thresholds) across American, Chinese MCR, Japanese Riichi, and Hong Kong Mahjong. Do not use for Charleston passing steps, NMJL Joker meld legality, or Riichi Furiten checks.	Compare high-level regional ruleset structures (tile deck size 136 vs 144 vs 152, hand length, and minimum Fan/point entry thresholds) across American, Chinese MCR, Japanese Riichi, and Hong Kong Mahjong. Do not use for Charleston passing steps, NMJL Joker meld legality, or Riichi Furiten checks.	No	Yes	Yes	No

Details

Registry status: Active
Published: Nov 10, 2026
Updated: Nov 10, 2026
Website: https://mahjonghandbook.com/⁠ (opens in a new tab)
Repository: https://github.com/AbigailDavised/mahjonghandbook-mcp⁠ (opens in a new tab)
Categories: Uncategorized
GDPR: Not declared

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