graph-polymarket-mcp

MCP server for querying Polymarket prediction market data via The Graph subgraphs and Polymarket REST APIs.

Exposes 31 tools that AI agents (Claude, Cursor, etc.) can use to search markets, get real-time CLOB prices and order books, query on-chain data, trader P&L, positions, activity, open interest, market resolution status, and trader profiles.

v2.0.0 — adds 10 new tools powered by Polymarket's Gamma and CLOB APIs (inspired by polymarket-cli): market search, event browsing, live prices, spreads, order books, price history, and more. No API key needed for these tools — they hit Polymarket's public REST endpoints directly.

Published to the MCP Registry as io.github.PaulieB14/graph-polymarket-mcp

Prerequisites

You need a free Graph API key (takes ~2 minutes):

1. Go to The Graph Studio
2. Connect your wallet (MetaMask, WalletConnect, etc.)
3. Click "API Keys" in the sidebar and create one
4. Free tier includes 100,000 queries/month

Installation

npm install -g graph-polymarket-mcp

Or use directly with npx:

npx graph-polymarket-mcp

Configuration

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "graph-polymarket": {
      "command": "npx",
      "args": ["-y", "graph-polymarket-mcp"],
      "env": {
        "GRAPH_API_KEY": "your-api-key-here"
      }
    }
  }
}

Claude Code

claude mcp add graph-polymarket -- npx -y graph-polymarket-mcp

Set the environment variable GRAPH_API_KEY before running.

Cursor / Other MCP Clients

Use the stdio transport with npx graph-polymarket-mcp as the command, passing GRAPH_API_KEY as an environment variable.

OpenClaw / Remote Agents (SSE)

Start the server with the HTTP transport:

# Dual transport — stdio + SSE on port 3851
GRAPH_API_KEY=your-key npx graph-polymarket-mcp --http

# SSE only (for remote/server deployments)
GRAPH_API_KEY=your-key npx graph-polymarket-mcp --http-only

# Custom port
MCP_HTTP_PORT=4000 GRAPH_API_KEY=your-key npx graph-polymarket-mcp --http

Then point your agent at the SSE endpoint:

{
  "mcpServers": {
    "graph-polymarket": {
      "url": "http://localhost:3851/sse"
    }
  }
}

Transport Modes

Invocation	Transports	Use case
npx graph-polymarket-mcp	stdio	Claude Desktop, Cursor, Claude Code
npx graph-polymarket-mcp --http	stdio + SSE :3851	Dual — local + remote agents
npx graph-polymarket-mcp --http-only	SSE :3851	OpenClaw, remote deployments

A /health endpoint is available at http://localhost:3851/health when HTTP transport is active.

Available Tools

Core Tools

Tool	Description
list_subgraphs	List all available Polymarket subgraphs with descriptions and key entities
get_subgraph_schema	Get the full GraphQL schema for a specific subgraph
query_subgraph	Execute a custom GraphQL query against any subgraph

Domain-Specific Tools

Tool	Description	Subgraphs
get_market_data	Get market/condition data with outcomes and resolution status	Main
get_global_stats	Get platform stats: market counts + real volume/fees/trades	Main + Orderbook
get_account_pnl	Get a trader's P&L and performance metrics (winRate, profitFactor, maxDrawdown)	Beefy P&L
get_top_traders	Leaderboard ranked by PnL, winRate, volume, or profitFactor. Cross-refs Orderbook to flag rows where OB volume exceeds Beefy-tracked volume and surface OB-only traders absent from the leaderboard.	Beefy P&L + Orderbook
get_daily_stats	Daily volume, fees, trader counts, and market activity (1–90 days)	Beefy P&L
get_market_positions	Top holders for a specific outcome token with their P&L	Beefy P&L
get_user_positions	Current token positions. Cross-refs Orderbook: flags ⚠ orderbook-only entry when totalBought=0 but OB volume exists, and ⚠ mixed entry when OB volume > 2× split collateral.	Slimmed P&L + Orderbook
get_recent_activity	Unified chronological feed interleaving splits, merges, and redemptions with orderbook fills. Supports optional address filter.	Activity + Orderbook
get_orderbook_trades	Get recent order fills with maker/taker filtering	Orderbook
get_market_open_interest	Top markets ranked by USDC locked in outstanding positions. Cross-refs Main subgraph to flag ⚠ dead money OI on resolved markets (losing-side tokens that will never be redeemed on-chain).	Open Interest + Main
get_oi_history	Hourly OI snapshots for a specific market (for charting trends)	Open Interest
get_global_open_interest	Total platform-wide open interest and market count	Open Interest
get_market_resolution	UMA oracle resolution status with filtering by status	Resolution
get_disputed_markets	Markets disputed during oracle resolution (high-signal events)	Resolution
get_market_revisions	Moderator interventions and updates on market resolution	Resolution
get_trader_profile	Full trader profile combining CTF events and USDC flows with Orderbook fills. Classifies wallet as hybrid / orderbook-only / split-collateral-only and warns when P&L subgraphs are unreliable.	Traders + Orderbook
get_trader_usdc_flows	USDC deposit/withdrawal history with direction filtering	Traders

Polymarket REST API Tools (no Graph API key needed)

Tool	Description	API
search_markets	Search markets by text query with filters (active, closed, sort by volume/liquidity)	Gamma
get_market_info	Get detailed market metadata by slug or condition ID	Gamma
list_polymarket_events	Browse events (groups of related markets) with tag/status filters	Gamma
get_polymarket_event	Get a single event with all its associated markets	Gamma
get_live_prices	Real-time CLOB prices for outcome tokens (buy/sell, single or batch)	CLOB
get_live_spread	Bid-ask spread + midpoint for assessing market liquidity	CLOB
get_live_orderbook	Full order book (all resting bids and asks) for a token	CLOB
get_price_history	Historical price time-series (1m to max interval, configurable fidelity)	CLOB
get_last_trade	Last trade price for an outcome token	CLOB
get_clob_market	CLOB market details: token IDs, live prices, min order/tick sizes	CLOB
search_markets_enriched	Power tool: search + auto-enrich with live CLOB prices AND on-chain resolution status in one call	Gamma + CLOB + Graph

Data Sources

The Graph Subgraphs (requires GRAPH_API_KEY)

On-chain indexed data — authoritative for historical analytics, P&L, open interest, and resolution status.

Subgraphs

Name	IPFS Hash	Description
Main	QmdyCguLEisTtQFveEkvMhTH7UzjyhnrF9kpvhYeG4QX8a	Complete ecosystem data
Beefy P&L	QmbHwcGkumWdyTK2jYWXV3vX4WyinftEGbuwi7hDkhPWqG	Comprehensive P&L tracking
Slimmed P&L	QmZAYiMeZiWC7ZjdWepek7hy1jbcW3ngimBF9ibTiTtwQU	Minimal position data
Activity	Qmf3qPUsfQ8et6E3QNBmuXXKqUJi91mo5zbsaTkQrSnMAP	Position management events
Orderbook	QmVGA9vvNZtEquVzDpw8wnTFDxVjB6mavTRMTrKuUBhi4t	Order fill analytics
Open Interest	QmbT2MmS2VGbGihiTUmWk6GMc2QYqoT9ZhiupUicYMWt6H	Per-market and global OI with hourly snapshots
Resolution	QmZnnrHWCB1Mb8dxxXDxfComjNdaGyRC66W8derjn3XDPg	UMA oracle resolution lifecycle
Traders	QmfT4YQwFfAi77hrC2JH3JiPF7C4nEn27UQRGNpSpUupqn	Per-trader event logs and USDC flows

Example Queries

Once connected, an AI agent can:

Market Discovery (Gamma API)

• "Search for prediction markets about AI"
• "Show me the most active Polymarket events right now"
• "Find markets about the 2024 election sorted by volume"
• "What markets are in the 'crypto' category?"

Live Trading Data (CLOB API)

• "What's the current price for the Trump YES token?"
• "Show me the full order book for this market"
• "What's the bid-ask spread on this token?"
• "Show me the price history for this market over the last week"

On-Chain Analytics (The Graph)

• "What are the current Polymarket global stats?"
• "Show me the latest 20 orderbook trades"
• "What are the positions for address 0x...?" (flags if wallet entered via OB buys only)
• "Get the P&L for trader 0x...?"
• "Which markets have the most open interest right now?" (flags dead-money OI on resolved markets)
• "Show me disputed markets on Polymarket"
• "Who are the top traders?" (flags any with OB volume not captured by Beefy P&L)
• "Show me the full trading history for wallet 0x..." (includes OB fills + entry type classification)

Development

git clone https://github.com/PaulieB14/graph-polymarket-mcp.git
cd graph-polymarket-mcp
npm install
npm run build
GRAPH_API_KEY=your-key node build/index.js

License

MIT