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Oracle3 prediction-market arbitrage checks

Oracle3 prediction-market arbitrage checks is an MCP server that adds finance tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Kalshi and Polymarket data, venue fees, no-arbitrage checks and paper execution for AI agents. It has 341 GitHub stars, is released under the Apache-2.0 license and runs locally with uvx oracle3.

github.com/YichengYang-Ethan/oracle3-prediction-market-agent (opens in a new tab)

  • Finance
  • Apache-2.0
  • Actively maintained
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Install Oracle3 prediction-market arbitrage checks

Generated from the server's MCP registry entry. Replace your-value with your own values.

Claude Desktop

claude_desktop_config.json
{
  "mcpServers": {
    "oracle3-prediction-market-arbitrage-checks": {
      "command": "uvx",
      "args": [
        "oracle3"
      ],
      "env": {
        "ORACLE3_MCP_LEDGER": "your-value"
      }
    }
  }
}

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

Claude Code

claude mcp add --env ORACLE3_MCP_LEDGER=your-value --transport stdio oracle3-prediction-market-arbitrage-checks -- uvx oracle3

Cursor

.cursor/mcp.json
{
  "mcpServers": {
    "oracle3-prediction-market-arbitrage-checks": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "oracle3"
      ],
      "env": {
        "ORACLE3_MCP_LEDGER": "your-value"
      }
    }
  }
}

Project file; use ~/.cursor/mcp.json to enable it in every project.

VS Code

.vscode/mcp.json
{
  "servers": {
    "oracle3-prediction-market-arbitrage-checks": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "oracle3"
      ],
      "env": {
        "ORACLE3_MCP_LEDGER": "your-value"
      }
    }
  }
}

Config formats checked against the official docs on Oct 7, 2026: modelcontextprotocol.io (opens in a new tab), code.claude.com (opens in a new tab), cursor.com (opens in a new tab), code.visualstudio.com (opens in a new tab).

Environment variables

Variables the server reads at startup.

NameRequiredDescription
ORACLE3_MCP_LEDGERNoPath of the local paper-trading ledger (default ~/.oracle3/mcppaperledger.json)

About Oracle3 prediction-market arbitrage checks

Oracle3 is an open-source trading engine and MCP server for prediction markets. It maps the logical relations between event contracts, finds prices that break the axioms of probability after each venue's fees, and trades them live on Kalshi, Polymarket and Solana, or on paper, under pre-trade risk limits.

  • algorithmic-trading
  • kalshi
  • polymarket
  • python
  • quantitative-finance
  • trading-bot
  • arbitrage
  • kelly-criterion
  • prediction-markets
  • agentic-ai

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FAQ

Oracle3 prediction-market arbitrage checks FAQ

Still curious? Email info@appsgit.com.

What is Oracle3 prediction-market arbitrage checks?

Oracle3 prediction-market arbitrage checks is an MCP server that adds finance tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Kalshi and Polymarket data, venue fees, no-arbitrage checks and paper execution for AI agents. It has 341 GitHub stars, is released under the Apache-2.0 license and runs locally with uvx oracle3. The source code is at github.com/YichengYang-Ethan/oracle3-prediction-market-agent.

How do I install the Oracle3 prediction-market arbitrage checks MCP server?

Add the command uvx oracle3 to your MCP client: put it in claude_desktop_config.json for Claude Desktop, run claude mcp add for Claude Code, or add it to .cursor/mcp.json (Cursor) or .vscode/mcp.json (VS Code). The snippets on this page are ready to paste.

Is Oracle3 prediction-market arbitrage checks free?

The server is open source under the Apache-2.0 license, so running it is free. It does not declare any required API key.

Is Oracle3 prediction-market arbitrage checks actively maintained?

The most recent commit was on Oct 7, 2026. The latest release is v1.2.2, published Sep 30, 2026. appsgit only lists MCP servers with a commit in the last six months and re-checks every server daily.