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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. 40 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 12 · avg 4 · -47% w/w
a month agotoday
40
Installs / week
npm · polymarket-guard-mcp
3
Stars
2 open issues
17 Jun 2026
Last commit
0 releases in 90 days
MIT
License
TypeScript

What the code does

We read the source, 23 h ago · rules 3dff92dd89df

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": {
      "args": [
        "-y",
        "polymarket-guard-mcp"
      ],
      "command": "npx"
    }
  }
}
~/.codex/config.toml
[mcp_servers.polymarket-guard]
command = "npx"
args = ["-y", "polymarket-guard-mcp"]
.cursor/mcp.json
{
  "mcpServers": {
    "polymarket-guard": {
      "args": [
        "-y",
        "polymarket-guard-mcp"
      ],
      "command": "npx"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "polymarket-guard": {
      "args": [
        "-y",
        "polymarket-guard-mcp"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: 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.). The author declared them in the registry entry; get the values from the project itself.

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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 40 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 with the file path 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 40 times in the last week. Week over week that is -47%. 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 2 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.