Polymarket Guard MCP Server
by evidaiio.github.evidai/polymarket-guardv0.1.0
Polymarket prediction markets — buy/sell positions in USDC. LemonCake pay-per-call billing.
context tax
queued
security
queued
cold start
queued
freshness
Slowing4mo ago
Install Polymarket Guard MCP server
Install in Claude Code
claude mcp add polymarket-guard -e POLYMARKET_PRIVATE_KEY='<polymarket-private-key>' -e LEMON_CAKE_BUYER_JWT='<lemon-cake-buyer-jwt>' -- npx -y polymarket-guard-mcpInstall in Cursor
{
"mcpServers": {
"polymarket-guard": {
"command": "npx",
"args": [
"-y",
"polymarket-guard-mcp"
],
"env": {
"POLYMARKET_PRIVATE_KEY": "<polymarket-private-key>",
"LEMON_CAKE_BUYER_JWT": "<lemon-cake-buyer-jwt>"
}
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).
Install in Claude Desktop
{
"mcpServers": {
"polymarket-guard": {
"command": "npx",
"args": [
"-y",
"polymarket-guard-mcp"
],
"env": {
"POLYMARKET_PRIVATE_KEY": "<polymarket-private-key>",
"LEMON_CAKE_BUYER_JWT": "<lemon-cake-buyer-jwt>"
}
}
}
}Settings → Developer → Edit Config (claude_desktop_config.json), then restart.
Install in VS Code
{
"servers": {
"polymarket-guard": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"polymarket-guard-mcp"
],
"env": {
"POLYMARKET_PRIVATE_KEY": "<polymarket-private-key>",
"LEMON_CAKE_BUYER_JWT": "<lemon-cake-buyer-jwt>"
}
}
}
}Add to .vscode/mcp.json in your workspace.
Install in Windsurf
{
"mcpServers": {
"polymarket-guard": {
"command": "npx",
"args": [
"-y",
"polymarket-guard-mcp"
],
"env": {
"POLYMARKET_PRIVATE_KEY": "<polymarket-private-key>",
"LEMON_CAKE_BUYER_JWT": "<lemon-cake-buyer-jwt>"
}
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
Configuration
| Variable | Required | Secret | Description |
|---|---|---|---|
| POLYMARKET_PRIVATE_KEY | — | yes | Polygon wallet private key for trading. Leave unset for read-only mode. |
| LEMON_CAKE_BUYER_JWT | — | yes | LemonCake Buyer JWT for pay-per-call billing. |
Freshness
Slowing — last maintenance signal 4mo ago. The newest of the signals below sets the band.
Last commit (default branch)
2026-06-17 · 4mo ago · GitHub
Latest release
2026-05-11 · 5mo ago · GitHub · xstocks-v0.1.0
Package published
no data · npm/PyPI
Registry entry updated
2026-05-16 · 5mo ago · official registry · v0.1.0
FAQ
›How do I install the Polymarket Guard MCP server in Claude Code?
Run: claude mcp add polymarket-guard -e POLYMARKET_PRIVATE_KEY='<polymarket-private-key>' -e LEMON_CAKE_BUYER_JWT='<lemon-cake-buyer-jwt>' -- npx -y polymarket-guard-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.
›Does Polymarket Guard require an API key?
Yes. It expects POLYMARKET_PRIVATE_KEY, LEMON_CAKE_BUYER_JWT, of which 2 are secrets.
›Can I use Polymarket Guard as a remote (hosted) MCP server?
No hosted endpoint is published; it runs locally over stdio.
›Is Polymarket Guard in the official MCP registry?
Yes, as io.github.evidai/polymarket-guard.