How do I get a Riot Games API key?

Register at [**developer.riotgames.com**](https://developer.riotgames.com/) and sign in with your Riot account to get your personal development API key. It's free and works immediately.

PUUID (Player Universally Unique Identifier) is a unique ID assigned to every Riot account. It's required for most API calls like match history and champion masteries. Get it using get_account_by_riot_id with the player's game name and tag line.

What are platform codes?

Platform codes identify specific game servers: na1 (North America), euw1 (Europe West), eun1 (Europe Nordic & East), kr (Korea), br1 (Brazil), jp1 (Japan), la1/la2 (Latin America), tr1 (Turkey), oc1 (Oceania). Match history uses regional routing instead: americas, europe, asia, sea.

What are the API rate limits?

Development API keys are limited to 20 requests per second and 100 requests per 2 minutes. If you exceed these limits, the API returns a 429 error. Wait a moment and retry.

Riot Games MCP Server for LangChain 12 tools — connect in under 2 minutes

Name: Riot Games
Availability: InStock
Author: Vinkius

python.langchain.com/docs/integrations/tools/mcp

Built by Vinkius GDPR 12 Tools Framework

LangChain is the leading Python framework for composable LLM applications. Connect Riot Games through Vinkius and LangChain agents can call every tool natively. combine them with retrievers, memory, and output parsers for sophisticated AI pipelines.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from langchain_mcp_adapters.client import MultiServerMCPClient
from langchain_openai import ChatOpenAI
from langgraph.prebuilt import create_react_agent

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    async with MultiServerMCPClient({
        "riot-games": {
            "transport": "streamable_http",
            "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
        }
    }) as client:
        tools = client.get_tools()
        agent = create_react_agent(
            ChatOpenAI(model="gpt-4o"),
            tools,
        )
        response = await agent.ainvoke({
            "messages": [{
                "role": "user",
                "content": "Using Riot Games, show me what tools are available.",
            }]
        })
        print(response["messages"][-1].content)

asyncio.run(main())

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* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About Riot Games MCP Server

Connect to Riot Games API and access League of Legends player data through natural conversation.

LangChain's ecosystem of 500+ components combines seamlessly with Riot Games through native MCP adapters. Connect 12 tools via Vinkius and use ReAct agents, Plan-and-Execute strategies, or custom agent architectures. with LangSmith tracing giving full visibility into every tool call, latency, and token cost.

What you can do

Player Lookup — Find any player by Riot ID (game name + tag line) and get their PUUID
Summoner Profile — Get summoner level, profile icon and account details
Match History — Browse recent matches with full details (KDA, items, runes, gold, damage)
Ranked Stats — Check current rank, tier, LP and win/loss records for all queues
Champion Masteries — View champion mastery levels, points and tokens
Live Games — Check if a player is currently in-game with team compositions and bans
Featured Games — Browse high-elo live games currently in progress
Champion Data — Get full champion info including abilities, stats, lore and skins

The Riot Games MCP Server exposes 12 tools through the Vinkius. Connect it to LangChain in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Riot Games to LangChain via MCP

Follow these steps to integrate the Riot Games MCP Server with LangChain.

Install dependencies

Run pip install langchain langchain-mcp-adapters langgraph langchain-openai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save the code and run python agent.py

Explore tools

The agent discovers 12 tools from Riot Games via MCP

Why Use LangChain with the Riot Games MCP Server

LangChain provides unique advantages when paired with Riot Games through the Model Context Protocol.

The largest ecosystem of integrations, chains, and agents. combine Riot Games MCP tools with 500+ LangChain components

Agent architecture supports ReAct, Plan-and-Execute, and custom strategies with full MCP tool access at every step

LangSmith tracing gives you complete visibility into tool calls, latencies, and token usage for production debugging

Memory and conversation persistence let agents maintain context across Riot Games queries for multi-turn workflows

Riot Games + LangChain Use Cases

Practical scenarios where LangChain combined with the Riot Games MCP Server delivers measurable value.

RAG with live data: combine Riot Games tool results with vector store retrievals for answers grounded in both real-time and historical data

Autonomous research agents: LangChain agents query Riot Games, synthesize findings, and generate comprehensive research reports

Multi-tool orchestration: chain Riot Games tools with web scrapers, databases, and calculators in a single agent run

Production monitoring: use LangSmith to trace every Riot Games tool call, measure latency, and optimize your agent's performance

Riot Games MCP Tools for LangChain (12)

These 12 tools become available when you connect Riot Games to LangChain via MCP:

get_account_by_puuid

Returns game name, tag line and account metadata. Get player account details by PUUID

get_account_by_riot_id

Returns the PUUID (Player Universally Unique Identifier), game name, tag line and account metadata. The PUUID is required for most other API calls. Get player account by Riot ID (game name + tag line)

get_active_game

Returns game mode, game type, banned champions, all players with their champions, summoner spells, runes and team info. Returns 404 if the summoner is not in a game. Platform codes: br1, na1, euw1, eun1, kr, jp1, oc1, la1, la2, tr1, ru. Get current live game for a summoner

get_champion_details

Uses Data Dragon (static data, no API key needed). Get detailed info for a specific champion

get_champion_masteries

Returns champion ID, mastery level (1-7), mastery points, last play time, chest earned status and tokens needed for next level. Platform codes: br1, na1, euw1, eun1, kr, jp1, oc1, la1, la2, tr1, ru. Get champion mastery data for a player

get_champions

Uses Data Dragon (static data, no API key needed). Optional version (e.g. "14.1.1") and locale (e.g. "en_US", "pt_BR"). Get all League of Legends champions

get_featured_games

Returns game mode, banned champions, all players with their champions, summoner spells and game length. Platform codes: br1, na1, euw1, eun1, kr, jp1, oc1, la1, la2, tr1, ru. Get currently featured games (high elo live games)

get_league_entries

Returns tier (IRON, BRONZE, SILVER, GOLD, PLATINUM, EMERALD, DIAMOND, MASTER, GRANDMASTER, CHALLENGER), rank (I-IV), LP, wins, losses and hot/streak info. Platform codes: br1, na1, euw1, eun1, kr, jp1, oc1, la1, la2, tr1, ru. Get ranked league entries for a summoner

get_match

Requires the regional routing where the match was played (americas, europe, asia, sea). Get detailed match data by match ID

get_match_ids

Returns up to 20 match IDs by default. Use count (1-100) to get more matches and start for pagination. Regional routing: americas (NA, BR, LAN, LAS), europe (EUW, EUNE, TR, RU), asia (KR, JP), sea (PH, SG, TH, TW, VN, OCE). Get match history (match IDs) for a player

get_summoner_by_id

Returns summoner level, profile icon ID, revision date and account ID. Platform codes: br1, na1, euw1, eun1, kr, jp1, oc1, la1, la2, tr1, ru. Get League of Legends summoner profile by summoner ID

get_summoner_by_puuid

The summoner ID is needed for league and spectator queries. Platform codes: br1, na1, euw1, eun1, kr, jp1, oc1, la1, la2, tr1, ru. Get League of Legends summoner profile by PUUID

Example Prompts for Riot Games in LangChain

Ready-to-use prompts you can give your LangChain agent to start working with Riot Games immediately.

"Find the summoner Faker on KR server."

"What's Faker's ranked stats on KR?"

"Get Faker's last 5 match IDs."

Troubleshooting Riot Games MCP Server with LangChain

Common issues when connecting Riot Games to LangChain through the Vinkius, and how to resolve them.

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

Riot Games + LangChain FAQ

Common questions about integrating Riot Games MCP Server with LangChain.

How does LangChain connect to MCP servers?

Use langchain-mcp-adapters to create an MCP client. LangChain discovers all tools and wraps them as native LangChain tools compatible with any agent type.

Which LangChain agent types work with MCP?

All agent types including ReAct, OpenAI Functions, and custom agents work with MCP tools. The tools appear as standard LangChain tools after the adapter wraps them.