League of Legends MCP Server

MCP server exposing 35 tools for League of Legends player analysis, match review, and training-plan generation.

Installation

Via npm (recommended)

npm install -g @rexlmanu/lol-mcp-server

Via npx (no install)

npx @rexlmanu/lol-mcp-server

From source

git clone https://github.com/rexlManu/lol-mcp-server.git
cd lol-mcp-server
pnpm install
pnpm build

Setup

cp .env.example .env
# Edit .env and add your RIOT_API_KEY

Get your Riot API key at https://developer.riotgames.com/

MCP Client Configuration

Add to your MCP client config (Cursor, Claude Desktop, etc.):

{
  "mcpServers": {
    "league-of-legends": {
      "command": "lol-mcp-server",
      "env": {
        "RIOT_API_KEY": "your-api-key-here"
      }
    }
  }
}

Or if installed from source:

{
  "mcpServers": {
    "league-of-legends": {
      "command": "node",
      "args": ["/path/to/lol-mcp-server/dist/index.js"],
      "env": {
        "RIOT_API_KEY": "your-api-key-here"
      }
    }
  }
}

Stack

• Runtime: Node.js 20+, TypeScript
• Package manager: pnpm
• MCP SDK: @modelcontextprotocol/sdk
• Validation: zod
• Scraping: cheerio (Lolalytics, League Wiki)
• Static data: Data Dragon API
• Testing: vitest

pnpm dev          # Run with tsx (hot reload)
pnpm build        # Compile to dist/
pnpm start        # Run compiled server
pnpm test         # Run tests
pnpm typecheck    # Type checking

MCP Client Configuration

Cursor / VS Code

{
  "mcpServers": {
    "league-of-legends": {
      "command": "node",
      "args": ["dist/index.js"],
      "env": {
        "RIOT_API_KEY": "your-api-key-here"
      }
    }
  }
}

opencode

{
  "mcpServers": {
    "league-of-legends": {
      "command": "node",
      "args": ["dist/index.js"],
      "env": {
        "RIOT_API_KEY": "your-api-key-here"
      }
    }
  }
}

Tools (35 total)

Account & Profile (4)

Tool	Description
lol_get_account	Get Riot account info by Riot ID
lol_get_summoner	Get summoner info (level, icon) by PUUID
lol_get_ranked	Get ranked stats (tier, rank, LP, win rate)
lol_get_player_profile	Complete player profile in one call

Match History (3)

Tool	Description
lol_get_match_history	Get recent match IDs (with filters)
lol_get_match_details	Get detailed match data (batch supported)
lol_get_match_timeline	Get minute-by-minute match timeline

Match Review (5)

Tool	Description
lol_get_player_match_summary	Compact review stats for one player in one match
lol_get_player_deaths	Chronological death timeline with killer, assists, position, and context
lol_get_player_vision_summary	Compact vision review with wards, control wards, trinkets, and phase grouping
lol_get_champion_review	Multi-match compact review for recent games on one champion
lol_get_timeline_events	Filtered timeline events by participant, event type, and time range

Champion & Live (4)

Tool	Description
lol_get_champion_mastery	Get champion mastery data
lol_get_live_game	Check if player is in game
lol_get_champion_rotation	Get free champion rotation
lol_get_featured_games	Get featured games

League & Clash (7)

Tool	Description
lol_get_league_by_id	Get league info by ID
lol_get_league_entries	Get league entries by summoner
lol_get_league_entries_exp	Get league entries (paginated, by queue/tier/division)
lol_get_league_top	Get top players (challenger/grandmaster/master)
lol_get_clash_tournaments	Get active Clash tournaments
lol_get_clash_player	Get Clash player info
lol_get_clash_team	Get Clash team info

Challenges & Status (3)

Tool	Description
lol_get_challenges	Get all challenge configurations
lol_get_player_challenges	Get player challenge progress
lol_get_server_status	Get server status (maintenance/incidents)

Static Game Data (4)

Tool	Description
lol_get_all_champions	List all champions (from Data Dragon)
lol_get_champ_info	Detailed champion info (Data Dragon + Wiki)
lol_get_all_items	List all items with stats, cost, build path
lol_get_runes	Get rune trees with keystones and descriptions

Lolalytics (1)

Tool	Description
lol_get_builds_for_champion	Scrape Lolalytics for builds, runes, counters, meta

AI Analysis (4)

Tool	Description
lol_analyze_performance	Analyze recent performance with recommendations
lol_analyze_champion	Analyze performance on a specific champion
lol_get_improvement_tips	Get personalized improvement tips
lol_compare_players	Compare stats between two players

Region Support

User-facing regions: euw, eune, na, kr, br, lan, las, oce, ru, tr, jp, ph2, sg2, th2, tw2, vn2

Platform routing: euw1, eun1, na1, kr, jp1, br1, la1, la2, oc1, tr1, ru

Regional routing: europe, americas, asia, sea

Caching

Data Type	TTL
Live game / server status	15-30s
Account / summoner / ranked	60s
Champion mastery / match history	2min
Lolalytics pages	5min
Match details / timelines	1h
Static data (champions/items/runes)	24h

Error Handling

Error	Description
not found (404)	Player/match not found
rate limited (429)	Auto-retry with backoff
forbidden (403)	Private data or restricted access
invalid key (401)	Invalid Riot API key
scrape_layout_changed	Lolalytics page structure changed
network failure	Connection/API error
invalid region	Unknown region code

Project Structure

src/
  index.ts              # Entry point, MCP server setup
  config.ts             # Environment config
  riot/
    client.ts           # Riot API HTTP client with rate limiting
    regions.ts          # Region routing maps
    types.ts            # Core Riot API types
    types-extra.ts      # Additional Riot API types
  cache/
    cache.ts            # TTL-based in-memory cache
  static-data/
    dataDragon.ts       # Data Dragon API client
    wikiScraper.ts      # League Wiki scraper (cheerio)
    types.ts            # Static data types
  lolalytics/
    scraper.ts          # Lolalytics page fetcher
    parser.ts           # HTML parser (cheerio)
    types.ts            # Lolalytics types
  tools/
    account.ts          # Account, summoner, ranked, profile, match tools
    champion.ts         # Mastery, live game, rotation, featured games
    league.ts           # League, clash, challenges, status
    staticData.ts       # Champions, items, runes
    lolalytics.ts       # Lolalytics builds
    analysis.ts         # Performance analysis, tips, comparison
  analysis/
    performance.ts      # Performance analysis engine
    championReview.ts   # Champion-specific analysis
    trainingPlan.ts     # Improvement tips generator
    compare.ts          # Player comparison
tests/
  regions.test.ts       # Region mapping tests
  cache.test.ts         # Cache tests
  lolalytics-parser.test.ts  # Parser tests
  analysis.test.ts      # Analysis engine tests

License

MIT