Tool	What it does
`search_cards`	Exact name card search (full stats, prices, banlist status)
`search_by_archetype`	Cards in an archetype (Blue Eyes, Branded, Dark Magician…)
`get_card`	Card by numeric id
`get_banlist`	Current TCG / OCG / GOAT forbidden & limited list, grouped by status

Usage

npm run build && node dist/index.js

Example:

search_cards { name: "blue-eyes white dragon" }
get_banlist { format: "tcg" }

Keyless. Prints ATK/DEF, level/link rating, card prices (TCGplayer/Cardmarket/eBay), and TCG/OCG banlist status per card.

Quick start

npm install
npm run build
node dist/index.js

The server uses stdio, so it can be connected to Claude Desktop, Cursor, VS Code, MCP Inspector, or another compatible MCP client.

Tools at a glance

search_cards: Search Yu-Gi-Oh! cards by exact name.
search_by_archetype: Search Yu-Gi-Oh! cards by archetype (e.g.
get_card: Get a single card by numeric id (from search results).
get_banlist: Get the current TCG/OCG forbidden & limited list.

Limits and privacy

This project is intentionally narrow. It should be treated as a practical helper, not a complete certification or security audit. Check the implementation and the returned data before using it with sensitive material. No credentials are required unless the project explicitly says otherwise.

Try it

After building, connect the server through your MCP client. The repository root also contains smoke-test.mjs for projects covered by the shared harness. A typical tool call starts with search_cards.

Premium tools

These tools need a license key:

highest_attack_cards

Buy a key at https://mcp-marketplace.io/server/io-github-mrfentmen-yugioh-mcp and set it in your MCP client config:

"env": { "MCP_LICENSE_KEY": "mcp_live_..." }

The key is checked against MCP Marketplace, cached for 24 hours, and keeps working offline once one check has succeeded. Every other tool on this server stays free.