io.github.j4th/mtg-mcp-server

Official

by j4th · Python

MTG MCP Server

Magic: The Gathering card search, combo lookup, draft analytics, and Commander tools.

Search Magic: The Gathering cards, combos, and draft analytics.

Topics

17landscommanderdraftedhfastmcpmagic-the-gatheringmcpmodel-context-protocolmtgpythonscryfallconstructedmetagamemoxfieldsideboardmtggoldfishspicerack

README.md18 KBView on GitHub

mtg-mcp-server

69 tools, 19 prompts, and 21 resources that give AI assistants deep access to Magic: The Gathering -- card data, combos, draft analytics, Commander metagame, competitive constructed, sideboard strategy, deck building, rules engine, and more. Works with Claude Code, Claude Desktop, or any MCP client.

Built on data from Scryfall, Commander Spellbook, 17Lands, EDHREC, Moxfield, Spicerack, and MTGGoldfish. See Data Sources & Attribution for details and usage terms.

What You Can Do — example prompts and real tool output
Install — hosted, Claude Code, Claude Desktop, PyPI, development
Configuration — environment variables and feature flags
Tools — all 69 tools across 13 domains
Architecture — FastMCP 3.x mount system
Stack — Python 3.12+, FastMCP, httpx, Pydantic
Development — mise commands for testing, linting, typechecking
Documentation — cookbook, architecture, tool reference, and more
Status — current tool/test counts
Data Sources & Attribution — Scryfall, Spellbook, 17Lands, EDHREC, Moxfield, Spicerack, MTGGoldfish

What You Can Do

Ask your AI assistant questions like these and it will use the MTG tools automatically:

Commander

"Show me everything about Muldrotha as a commander"
"What are the best budget upgrades for my Atraxa deck under $5?"
"Compare Muldrotha vs Meren vs Karador as graveyard commanders"

Draft & Limited

"What are the best commons in Foundations for draft?"
"Rank these cards for my draft pack: Bitter Triumph, Monstrous Rage, Torch the Tower"
"Build a sealed deck from this pool: [list]"

Deck Building

"Validate my Modern decklist"
"Suggest a mana base for my 3-color Commander deck"
"Find cards that synergize with sacrifice themes in Golgari"

Rules

"How do deathtouch and trample interact?"
"Resolve this combat scenario: my 3/3 with first strike blocks their 5/5 with trample"

Constructed

"What does the Modern metagame look like right now?"
"Show me the stock Boros Energy decklist for Modern"
"Build me a sideboard for this Pioneer deck"
"Give me a sideboard guide for my deck against Azorius Control"

See It in Action

"Compare Muldrotha, Meren, and Karador as graveyard commanders"

code

                     Muldrotha            Meren               Karador
Mana Cost            {3}{B}{G}{U}         {2}{B}{G}           {5}{W}{B}{G}
Color Identity       BGU (Sultai)         BG (Golgari)        BGW (Abzan)
Stats                6/6                  3/4                  3/4
EDHREC Rank          #1,137               #1,476              #9,894
Total Decks          22,460               19,919              6,305
Combo Count          10                   1                   10

Top Staples:
  Muldrotha           Spore Frog (+53%), Sakura-Tribe Elder (+36%), Eternal Witness (+27%)
  Meren               Spore Frog (+70%), Sakura-Tribe Elder (+55%), Viscera Seer (+52%)
  Karador             Karmic Guide (+51%), Satyr Wayfinder (+49%), Sun Titan (+48%)

"What are the best commons in Foundations for draft?"

code

Foundations (FDN) — PremierDraft · Median GIH WR: 54.7%

Rank  Card               Color  GIH WR   ALSA   IWD      Games
1     Bake into a Pie    B      58.4%    3.1    +5.3%    354,741
2     Burst Lightning    R      58.2%    3.3    +3.0%    338,888
3     Refute             U      58.1%    5.3    +4.3%    321,280
4     Stab               B      57.9%    3.4    +4.5%    376,569
5     Dazzling Angel     W      57.8%    3.2    +2.4%    317,648

Trap rares: Doubling Season (39.4%), Thousand-Year Storm (35.2%) ...

More examples with real tool output in the Cookbook.

Install

No API keys needed -- all data sources are public.

Hosted (zero setup)

The fastest way to get started. No Python install required. Works on mobile.

Via the UI (Claude Desktop or claude.ai): Settings → Connectors → Add custom connector → paste the URL:

code

https://mtg-mcp-server.fastmcp.app/mcp

Via config file (~/Library/Application Support/Claude/claude_desktop_config.json on macOS, %APPDATA%\Claude\claude_desktop_config.json on Windows):

json

{
  "mcpServers": {
    "mtg": {
      "type": "url",
      "url": "https://mtg-mcp-server.fastmcp.app/mcp"
    }
  }
}

Claude Code

bash

claude mcp add mtg -- uvx mtg-mcp-server

Or via the UI: Settings → MCP Servers → Add server → enter uvx mtg-mcp-server as the command.

Claude Desktop (local)

Runs on your machine. Requires Python 3.12+.

json

{
  "mcpServers": {
    "mtg": {
      "command": "uvx",
      "args": ["mtg-mcp-server"]
    }
  }
}

PyPI

bash

# Run directly (no install)
uvx mtg-mcp-server

# Install globally
uv tool install mtg-mcp-server

# Add to a project
uv add mtg-mcp-server

Development

bash

git clone https://github.com/j4th/mtg-mcp-server.git
cd mtg-mcp-server
mise install          # Installs Python 3.12, uv, ruff, ty
mise run setup        # Creates venv, installs dependencies

uv run mtg-mcp-server # Run the server

Claude Code config for local development:

json

{
  "mcpServers": {
    "mtg": {
      "command": "uv",
      "args": ["run", "--directory", "/path/to/mtg-mcp-server", "mtg-mcp-server"]
    }
  }
}

Configuration

All settings use MTG_MCP_ environment variables. Everything works out of the box with sensible defaults.

bash

# Feature flags for optional backends
MTG_MCP_ENABLE_EDHREC=false       # EDHREC (scrapes undocumented endpoints)
MTG_MCP_ENABLE_17LANDS=false      # 17Lands (rate-limits aggressively)
MTG_MCP_ENABLE_BULK_DATA=false    # Scryfall bulk data (~30MB download on first use)
MTG_MCP_ENABLE_RULES=false        # Comprehensive Rules engine

# Pass env vars through uvx
uvx --env MTG_MCP_ENABLE_EDHREC=false mtg-mcp-server

See .env.example for all available options including base URLs, rate limits, and cache settings.

Tools

69 tools across 13 domains. See docs/TOOL_DESIGN.md for full input/output details.

Card Data (`scryfall_*`)

Tool	Description
`search_cards`	Search using full Scryfall syntax (`f:commander id:sultai t:creature`)
`card_details`	Full card data by exact or fuzzy name
`card_price`	Current USD, EUR, and foil prices
`card_rulings`	Official rulings and clarifications
`set_info`	Set metadata by code
`whats_new`	Recently released or previewed cards

Bulk Data (`bulk_*`)

Tool	Description
`card_lookup`	Rate-limit-free card lookup by exact name
`card_search`	Search by name, type, or oracle text
`format_legality`	Check if a card is legal in a format
`format_search`	Search for cards legal in a specific format
`format_staples`	Top-played cards in a format by EDHREC rank
`ban_list`	Banned and restricted cards for a format
`card_in_formats`	Card legality across all formats
`random_card`	Random card, optionally filtered by format or type
`similar_cards`	Find cards similar by type, keywords, or mana cost

Combos (`spellbook_*`)

Tool	Description
`find_combos`	Search for combos by card name and color identity
`combo_details`	Step-by-step combo instructions by ID
`find_decklist_combos`	Find combos present in a decklist
`estimate_bracket`	Estimate Commander bracket for a decklist

Draft Analytics (`draft_*`)

Tool	Description
`card_ratings`	Win rates and draft data for cards in a set (17Lands)
`archetype_stats`	Win rates by color pair for a set

Commander Metagame (`edhrec_*`)

Tool	Description
`commander_staples`	Most-played cards for a commander with synergy scores
`card_synergy`	Synergy data for a card with a specific commander

Decklists (`moxfield_*`)

Tool	Description
`decklist`	Fetch a full decklist by deck ID or URL
`deck_info`	Deck metadata (name, format, author, dates)
`search_decks`	Search public decks by format, keyword, or sort order
`user_decks`	List a user's public decks

Tournament Data (`spicerack_*`)

Tool	Description
`recent_tournaments`	Recent tournaments for a competitive format
`tournament_results`	Full standings for a specific tournament
`format_decklists`	Top-finishing decklists across recent tournaments

Metagame (`goldfish_*`)

Tool	Description
`metagame`	Current metagame breakdown for a competitive format
`archetype_list`	Sample decklist for an archetype
`format_staples`	Most-played cards in a format with deck inclusion %
`deck_price`	Estimated paper price for an archetype deck

Commander Workflows

Tool	Description
`commander_overview`	Full commander profile from all sources
`evaluate_upgrade`	Assess whether a card is worth adding to a deck
`card_comparison`	Compare 2-5 cards side-by-side for a commander
`budget_upgrade`	Budget-constrained upgrade suggestions ranked by synergy/$
`commander_comparison`	Compare 2-5 commanders head-to-head
`color_identity_staples`	Top-played cards across all commanders in a color identity

Deck Building

Tool	Description
`theme_search`	Find cards matching a mechanical or tribal theme
`build_around`	Detect synergies from key cards and find complements
`complete_deck`	Gap analysis and suggestions for a partial decklist
`tribal_staples`	Best cards for a creature type in a color identity
`precon_upgrade`	Analyze a precon and suggest swap pairs
`suggest_cuts`	Identify the weakest cards to cut from a decklist
`deck_analysis`	Full decklist health check (curve, colors, combos, budget)
`deck_validate`	Validate a decklist against format construction rules
`suggest_mana_base`	Suggest lands based on color pip distribution
`price_comparison`	Compare prices across multiple cards

Draft Workflows

Tool	Description
`draft_pack_pick`	Rank cards in a draft pack using 17Lands data
`set_overview`	Top commons/uncommons and trap rares for a format
`sealed_pool_build`	Suggest the best 40-card builds from a sealed pool
`draft_signal_read`	Detect open colors from draft picks
`draft_log_review`	Pick-by-pick review of a completed draft with grade

Constructed Workflows

Tool	Description
`rotation_check`	Standard rotation status and rotating cards
`metagame_snapshot`	Tiered metagame breakdown with prices
`archetype_decklist`	Stock decklist for a competitive archetype
`archetype_comparison`	Compare 2-4 archetypes side-by-side
`format_entry_guide`	Beginner guide for entering a competitive format
`suggest_sideboard`	15-card sideboard suggestions for a deck
`sideboard_guide`	In/out plan for a specific matchup
`sideboard_matrix`	Sideboard matrix across common matchups

Rules Engine

Tool	Description
`rules_lookup`	Look up rules by number or keyword
`keyword_explain`	Explain a keyword with rules and example cards
`rules_interaction`	How two mechanics interact with rule citations
`rules_scenario`	Rules framework for a game scenario
`combat_calculator`	Step-by-step combat phases with keyword interactions

Architecture

Built on FastMCP 3.x. Each data source is an independent sub-server mounted into a single orchestrator:

code

MTG (orchestrator)
├── scryfall (namespace: scryfall_)     -> Scryfall REST API
├── spellbook (namespace: spellbook_)   -> Commander Spellbook API
├── draft (namespace: draft_)           -> 17Lands data
├── edhrec (namespace: edhrec_)         -> EDHREC (scraped, feature-flagged)
├── bulk (namespace: bulk_)             -> Scryfall Oracle Cards bulk data
├── moxfield (namespace: moxfield_)     -> Moxfield (reverse-engineered, feature-flagged)
├── spicerack (namespace: spicerack_)   -> Spicerack tournament API
├── goldfish (namespace: goldfish_)     -> MTGGoldfish (scraped, feature-flagged)
└── workflows (no namespace)            -> 36 tools (31 composed + 5 rules)

Services are pure async API clients. Providers register MCP tools. Workflows compose across services with partial failure tolerance. See docs/ARCHITECTURE.md for the full picture.

Stack


Runtime	Python 3.12+, uv
MCP	FastMCP 3.2.x
HTTP	httpx (async)
Validation	Pydantic v2
Logging	structlog
Tooling	mise, ruff, ty (Astral)
Testing	pytest, respx, pytest-asyncio
HTML parsing	selectolax

Development

bash

git clone https://github.com/j4th/mtg-mcp-server.git
cd mtg-mcp-server
mise install          # Installs Python, uv, ruff, ty
mise run setup        # Creates venv, installs dependencies

mise run check        # Full quality gate: lint + typecheck + tests
mise run check:quick  # Fast gate: lint + typecheck + affected tests only
mise run test         # All tests with coverage
mise run test:quick   # Only tests affected by recent changes
mise run lint         # ruff check + format check
mise run typecheck    # ty check
mise run dev          # MCP Inspector for interactive testing
mise run fix          # Auto-fix lint and format issues

Documentation

Doc	What it covers
COOKBOOK.md	Usage recipes -- Commander, draft, deck building, rules workflows
TOOL_DESIGN.md	Full reference for all 69 tools, 19 prompts, 21 resources
ARCHITECTURE.md	Technical architecture, FastMCP patterns, design decisions
SERVICE_CONTRACTS.md	API endpoints, rate limits, response shapes per backend
DATA_SOURCES.md	All data sources with auth, stability, and access patterns
CACHING_DESIGN.md	TTL cache strategy and Scryfall bulk data design
CONTRIBUTING.md	Development setup, TDD workflow, code style, PR process
CHANGELOG.md	Version history in Keep a Changelog format

Status

69 tools, 19 prompts, 21 resource templates. 1340 tests at 88% coverage.

Phase	What	Status
0	Project scaffold	Done
1	Scryfall backend (4 tools)	Done
2	Spellbook + 17Lands + EDHREC backends (9 tools)	Done
3	Workflow tools -- commander, draft, deck (4 tools)	Done
4	TTL caching + Scryfall bulk data provider (2 tools)	Done
5	Analysis & comparison workflows, prompts, resources (4 tools)	Done
Branch A	Structured output, rules engine, validation tools (17 tools)	Done
Branch B	Format workflows -- deck building, commander depth, limited, constructed (11 tools)	Done
Moxfield	Moxfield decklist provider (4 tools)	Done
Spicerack	Tournament results provider (3 tools)	Done
MTGGoldfish	Metagame data provider (4 tools)	Done
v2.3.0	Metagame workflows, sideboard tools, Moxfield search (9 tools)	Done

Data Sources & Attribution

This project composes data from multiple third-party services:

Scryfall -- Card database, prices, rulings, search, bulk data (API guidelines)
Commander Spellbook -- Combo search, bracket estimation (MIT license)
17Lands -- Draft card ratings, archetype win rates (usage guidelines)
EDHREC -- Commander staples, synergy scores (undocumented endpoints, behind feature flag)
Moxfield -- Public decklists and deck search (reverse-engineered API, behind feature flag)
Spicerack -- Tournament results and standings (documented API)
MTGGoldfish -- Competitive metagame data, archetypes, format staples (HTML scraping, behind feature flag)

See THIRD_PARTY_NOTICES.md for full license texts and usage terms.

Disclaimer

mtg-mcp-server is unofficial Fan Content permitted under the Fan Content Policy. Not approved/endorsed by Wizards. Portions of the materials used are property of Wizards of the Coast. © Wizards of the Coast LLC.

License

MIT -- see LICENSE

Install

Configuration

Environment variables

MTG_MCP_TRANSPORTdefault stdio

Server transport — 'stdio' (default) or 'http'

MTG_MCP_HTTP_PORTdefault 8000

HTTP port when transport is 'http'

MTG_MCP_LOG_LEVELdefault INFO

Logging level — DEBUG, INFO, WARNING, or ERROR

MTG_MCP_ENABLE_17LANDSdefault true

Enable 17Lands draft analytics backend

MTG_MCP_ENABLE_EDHRECdefault true

Enable EDHREC commander metagame backend (uses undocumented endpoints)

MTG_MCP_ENABLE_BULK_DATAdefault true

Enable Scryfall Oracle Cards bulk data for rate-limit-free lookups (~30 MB download)

MTG_MCP_SCRYFALL_RATE_LIMIT_MSdefault 100

Minimum delay between Scryfall API calls in milliseconds

MTG_MCP_BULK_DATA_REFRESH_HOURSdefault 12

Hours between Scryfall bulk data refreshes

MTG_MCP_ENABLE_RULESdefault true

Enable Comprehensive Rules engine for rules lookup and keyword tools

MTG_MCP_DISABLE_CACHEdefault false

Disable in-memory TTL caching (useful for testing)

MTG_MCP_ENABLE_MOXFIELDdefault true

Enable Moxfield deck search and import backend (reverse-engineered API)

MTG_MCP_ENABLE_SPICERACKdefault true

Enable Spicerack tournament results backend

MTG_MCP_ENABLE_MTGGOLDFISHdefault true

Enable MTGGoldfish metagame data backend (HTML scraping)

claude_desktop_config.json

{
  "mcpServers": {
    "mtg-mcp-server": {
      "command": "uvx",
      "args": [
        "mtg-mcp-server"
      ],
      "env": {
        "MTG_MCP_TRANSPORT": "stdio",
        "MTG_MCP_HTTP_PORT": "8000",
        "MTG_MCP_LOG_LEVEL": "INFO",
        "MTG_MCP_ENABLE_17LANDS": "true",
        "MTG_MCP_ENABLE_EDHREC": "true",
        "MTG_MCP_ENABLE_BULK_DATA": "true",
        "MTG_MCP_SCRYFALL_RATE_LIMIT_MS": "100",
        "MTG_MCP_BULK_DATA_REFRESH_HOURS": "12",
        "MTG_MCP_ENABLE_RULES": "true",
        "MTG_MCP_DISABLE_CACHE": "false",
        "MTG_MCP_ENABLE_MOXFIELD": "true",
        "MTG_MCP_ENABLE_SPICERACK": "true",
        "MTG_MCP_ENABLE_MTGGOLDFISH": "true"
      }
    }
  }
}

Topics

mtg-mcp-server

Table of Contents

What You Can Do

See It in Action

Install

Hosted (zero setup)

Claude Code

Claude Desktop (local)

PyPI

Development

Configuration

Tools

Card Data (scryfall_*)

Bulk Data (bulk_*)

Combos (spellbook_*)

Draft Analytics (draft_*)

Commander Metagame (edhrec_*)

Decklists (moxfield_*)

Tournament Data (spicerack_*)

Metagame (goldfish_*)

Commander Workflows

Deck Building

Draft Workflows

Constructed Workflows

Rules Engine

Architecture

Stack

Development

Documentation

Status

Data Sources & Attribution

Disclaimer

License

Install

Configuration

Card Data (`scryfall_*`)

Bulk Data (`bulk_*`)

Combos (`spellbook_*`)

Draft Analytics (`draft_*`)

Commander Metagame (`edhrec_*`)

Decklists (`moxfield_*`)

Tournament Data (`spicerack_*`)

Metagame (`goldfish_*`)