How to install Oracle3 prediction-market arbitrage checks in Cursor

Kalshi and Polymarket data, venue fees, no-arbitrage checks and paper execution for AI agents.

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Steps

1Install uv (for uvx): https://docs.astral.sh/uv/
2Open .cursor/mcp.json in your project (or ~/.cursor/mcp.json for all projects)
3Add the entry below. If the file already has "mcpServers", add just the inner entry
4Check Cursor Settings → MCP and enable the server

Configuration

.cursor/mcp.json

{
  "mcpServers": {
    "oracle3-prediction-market-agent": {
      "command": "uvx",
      "args": [
        "oracle3"
      ]
    }
  }
}

Environment variable	Required	What it is
ORACLE3_MCP_LEDGER	No	Path of the local paper-trading ledger (default ~/.oracle3/mcp_paper_ledger.json)

Install in other clients

Claude Code Claude Desktop Windsurf Gemini CLI OpenAI Agents SDK

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