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.
We read the source, 23 h ago · rules 3dff92dd89df
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.
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.
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.
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.
claude mcp add polymarket-guard -- npx -y polymarket-guard-mcp
{
"mcpServers": {
"polymarket-guard": {
"args": [
"-y",
"polymarket-guard-mcp"
],
"command": "npx"
}
}
}
[mcp_servers.polymarket-guard]
command = "npx"
args = ["-y", "polymarket-guard-mcp"]
{
"mcpServers": {
"polymarket-guard": {
"args": [
"-y",
"polymarket-guard-mcp"
],
"command": "npx"
}
}
}
{
"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.
Live prediction markets: Polymarket + Kalshi prices, odds, order books. Pay-per-call USDC, no key.
Monetize any MCP server: x402 paywall, pay-per-call billing in USDC on Base, agent marketplace.
Self-hosted MCP server for AI agent trading on Polymarket prediction markets
Pay-per-call agent tools: Polymarket signals, IPFS pinning, EIP-712 attestations. USDC on Base.
Korean market data: kimchi premium, sell-side research, news. Pay per call in USDC via x402.
Crypto market intelligence MCP — pay-per-tool-call in USDC on Base via the x402 protocol.
Web search, deep research, prediction markets & crypto data for AI agents. Pay per call via x402.
Crypto signals, Kalshi prediction markets, wallet AML. x402 USDC on Base.
Answers built from our own checks of this server.