Is Agent Payment free?

Yes, Agent Payment is free to use.

How do I install Agent Payment?

Agent Payment is a local plugin. Install it using npm package: polymarket-guard-mcp and add the generated configuration snippet to your AI app's MCP config file. Then restart your AI app.

What credentials does Agent Payment need?

Agent Payment requires the following credentials or environment variables: POLYMARKET_PRIVATE_KEY, LEMON_CAKE_BUYER_JWT. You can find setup instructions on the server detail page.

What AI apps work with Agent Payment?

Agent Payment uses the Model Context Protocol (MCP) and works with any MCP-compatible AI app, including Claude, ChatGPT / Codex, Gemini, Copilot, Cursor, and more.

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Agent Payment MCP Server

by Evidai

Developer ToolsLow Risk9.7MCP RegistryLocal

Free

Server data from the Official MCP Registry

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

About

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

Security Report

9.7

Low Risk9.7Low Risk

Valid MCP server (2 strong, 2 medium validity signals). No known CVEs in dependencies. ⚠️ Package registry links to a different repository than scanned source. Imported from the Official MCP Registry. 1 finding(s) downgraded by scanner intelligence.

14 files analyzed · 1 issue found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Required

This plugin requests these system permissions. Most are normal for its category.

HTTP Network Access

Connects to external APIs or services over the internet.

env_vars

Check that this permission is expected for this type of plugin.

What You'll Need

Set these up before or after installing:

Polygon wallet private key for trading. Leave unset for read-only mode.Required

Environment variable: POLYMARKET_PRIVATE_KEY

LemonCake Buyer JWT for pay-per-call billing.Required

Environment variable: LEMON_CAKE_BUYER_JWT

How to Install

Add this to your MCP configuration file:

{
  "mcpServers": {
    "io-github-evidai-polymarket-guard": {
      "env": {
        "LEMON_CAKE_BUYER_JWT": "your-lemon-cake-buyer-jwt-here",
        "POLYMARKET_PRIVATE_KEY": "your-polymarket-private-key-here"
      },
      "args": [
        "-y",
        "polymarket-guard-mcp"
      ],
      "command": "npx"
    }
  }
}

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Agent Payment MCP Server

About

Security Report

Findings (1)

Permissions Required

What You'll Need

How to Install

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