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Polymarket Guard MCP Server

local only

Polymarket Guard runs on your own machine — the client starts it, so there is no endpoint to ping. 54 installs a week from npm. Last commit 17 Jun 2026.

Polymarket prediction markets — buy/sell positions in USDC. LemonCake pay-per-call billing.

Installs per day peak 9 · avg 4 · +13% w/w
a month agotoday
54
Installs / week
npm · polymarket-guard-mcp
3
Stars
4 open issues
17 Jun 2026
Last commit
no releases in 90 days
MIT
License
TypeScript

What the code does

We read the source, 5 d ago · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Package points at a different repository evidai/agent-payment-mcp
пакет polymarket-guard-mcp ссылается на evidai/lemon-cake

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

run in your terminal
claude mcp add polymarket-guard -- npx -y polymarket-guard-mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "polymarket-guard": {
      "command": "npx",
      "args": [
        "-y",
        "polymarket-guard-mcp"
      ]
    }
  }
}
~/.codex/config.toml
[mcp_servers.polymarket-guard]
command = "npx"
args = ["-y", "polymarket-guard-mcp"]
.cursor/mcp.json
{
  "mcpServers": {
    "polymarket-guard": {
      "command": "npx",
      "args": [
        "-y",
        "polymarket-guard-mcp"
      ]
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "polymarket-guard": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "polymarket-guard-mcp"
      ]
    }
  }
}

Optional settings from the registry entry, left out of the block above: POLYMARKET_PRIVATE_KEY (Polygon wallet private key for trading. Leave unset for read-only mode), LEMON_CAKE_BUYER_JWT (LemonCake Buyer JWT for pay-per-call billing).

Alternatives to Polymarket Guard

same job, measured the same way
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Toolbooth
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Polymarket MCP Server
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Self-hosted MCP server for AI agent trading on Polymarket prediction markets

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PMWallets copy-trading bot
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Polymarket orders from your own machine: market, balance, positions, buy/sell with limits.

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K Data MCP
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Korean market data: kimchi premium, sell-side research, news. Pay per call in USDC via x402.

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Polymarket Guard — questions

Answers built from our own checks of this server.

Why is there no uptime for Polymarket Guard?
Polymarket Guard runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package polymarket-guard-mcp was installed 54 times last week.
How do I connect Polymarket Guard?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls polymarket-guard-mcp straight from npm; nothing to host, nothing to sign up for.
How many people use Polymarket Guard?
The npm package polymarket-guard-mcp was installed 54 times in the last week. Week over week that is +13%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Polymarket Guard open source?
Yes — it is published under the MIT licence, written in TypeScript, 3 stars on GitHub and 4 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.