// SCAN REPORT

Polymarket MCP Server

22 tools. 3 can modify or destroy data without limits.

3 destructive tools with no built-in limits. Policy required.

Last updated: 3 Jul 2026

3 can modify or destroy data

19 read-only

22 tools total

Community server · catalogue entry verified 03/07/2026

How to control Polymarket MCP Server ↓

TOOL MAP

What Polymarket MCP Server exposes to your agents

Read (19) Write / Execute (0) Destructive / Financial (3)

Running more than one server? Check your whole stack →

MOST DANGEROUS TOOLS

Critical Risk

The most dangerous Polymarket MCP Server tools

Financial · High calculate_ev This tool performs financial calculations (expected value and Kelly criterion sizing) specifically for placing bets on Polymarket. Financial · High kelly_size The Kelly criterion is a formula used to determine optimal bet/investment sizing. Financial · High paper_trade The name 'paper_trade' suggests simulating trades, which in a true paper trading context would be non-financial (no real money).

3 of Polymarket MCP Server's 22 tools can modify, destroy, or commit something on every call — and an agent calls them with no built-in limits.

POLICY

How to control Polymarket MCP Server

PolicyLayer is an MCP gateway — it sits between your AI agents and Polymarket MCP Server, and nothing reaches the server without passing your rules. These are the rules we recommend:

Block financial tools by default

{
  "calculate_ev": {
    "deny_if": [
      {
        "conditions": [],
        "on_deny": "Requires human approval."
      }
    ]
  }
}

Financial tools should be explicitly enabled per use case, not open by default.

Cap read operations

{
  "arbitrage_scan": {
    "limits": [
      {
        "counter": "arbitrage_scan_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register Polymarket MCP Server — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON POLYMARKET →

Instant setup, no code required.

FULL CATALOGUE

All 22 Polymarket MCP Server tools

FINANCIAL 3 tools

Financial calculate_ev Calculate expected value + Kelly sizing for a Polymarket bet. Financial kelly_size Calculate Kelly criterion bet sizing. Financial paper_trade paper_trade

READ 19 tools

Read arbitrage_scan Check for arbitrage across Polymarket outcomes. Input comma-separated YES prices. Read crypto_fear_greed Bitcoin Fear & Greed Index — 7-day history with trading signals. Read crypto_overview Top 20 crypto by volume — prices, 24h change, volume. Read crypto_prediction_markets Get active crypto-related Polymarket prediction markets (BTC, ETH, etc). Read crypto_prices Get live crypto prices from Binance with 24h change and volume. Read crypto_vs_predictions Compare live crypto price with related Polymarket prediction markets. Read edge_finder Find mispriced Polymarket contracts using news sentiment analysis. Read get_market Get full details of a Polymarket market. Read get_orderbook Fetch live orderbook (bids/asks/spread) from Polymarket CLOB. Read market_summary Human-readable market summary with implied probability. Read paper_history Full paper trade history with win rate and total P&L. Read paper_portfolio Show all open paper trading positions with unrealised P&L. Read paper_settle Manually settle a paper trade as WIN or LOSE. Read research_market Research a prediction market question — news + YouTube + sentiment for edge finding. Read scan_edges Scan all active Polymarket markets for mispriced edges using volume/liquidity heuristics. Read search_markets Search Polymarket for active prediction markets by keyword. Read sports_prediction_markets Get active sports prediction markets (NBA, NFL, UFC, etc). Read trending_markets Get top active Polymarket markets by trading volume. Read whale_activity Check top 10 Polymarket whale traders and cross-reference with current edge signals.

FAQ

Questions about Polymarket MCP Server

Can an AI agent move money through the Polymarket MCP Server MCP server? +

Yes. The Polymarket MCP Server server exposes 3 financial tools including calculate_ev, kelly_size, paper_trade. Without a policy, an autonomous agent can call these with no spend caps, no rate limits, and no approval flow. PolicyLayer lets you block financial tools by default, require human approval, or set per-tool rate limits — enforced on every call.

How many tools does the Polymarket MCP Server MCP server expose? +

22 tools across 1 categories: Read. 19 are read-only. 3 can modify, create, or delete data.

How do I enforce a policy on Polymarket MCP Server? +

Register the Polymarket MCP Server MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every Polymarket MCP Server tool call.

Deterministic rules across all 22 Polymarket MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

ENFORCE POLICY ON POLYMARKET →

Instant setup, no code required.

22 Polymarket MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.