MCP server for trading and monitoring prediction markets across Polymarket, Kalshi, Opinion, Limitless, and PredictFun — from any AI assistant.

Search markets, stream live orderbooks, preview and place trades, and manage your portfolio through natural language. Works with Claude Desktop, Cursor, VS Code Copilot, Cline, Windsurf, and any MCP-compatible client.

PARSEC_API_KEY=pk_live_... npx parsec-mcp serve

Get your API key at parsecapi.com.

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "parsec": {
      "command": "npx",
      "args": ["-y", "parsec-mcp", "serve"],
      "env": {
        "PARSEC_API_KEY": "pk_live_..."
      }
    }
  }
}

Add to .cursor/mcp.json in your project:

{
  "mcpServers": {
    "parsec": {
      "command": "npx",
      "args": ["-y", "parsec-mcp", "serve"],
      "env": {
        "PARSEC_API_KEY": "pk_live_..."
      }
    }
  }
}

Add to .vscode/mcp.json:

{
  "servers": {
    "parsec": {
      "command": "npx",
      "args": ["-y", "parsec-mcp", "serve"],
      "env": {
        "PARSEC_API_KEY": "pk_live_..."
      }
    }
  }
}

Add to your MCP configuration:

{
  "mcpServers": {
    "parsec": {
      "command": "npx",
      "args": ["-y", "parsec-mcp", "serve"],
      "env": {
        "PARSEC_API_KEY": "pk_live_..."
      }
    }
  }
}

High-level tools designed for AI agents — these handle market resolution, multi-step workflows, and formatting automatically.

Stream live orderbook snapshots, deltas, and trade activity over WebSocket.

For platforms building on top of Parsec with per-user isolation.

Advanced conditional token operations (most users should use create_order instead).

Once connected, try asking your AI assistant:

• "What prediction markets are available about Bitcoin?"
• "Show me the orderbook for the Trump 2028 market on Polymarket"
• "What's my Kalshi balance?"
• "Preview buying 50 Yes contracts on that market"
• "Open a live feed for the ETH price market"
• "Am I set up to trade?"

• API key is passed via environment variable, never in tool calls
• Sensitive tools (create_order, cancel_order, export_key) are annotated as destructive
• Wallet export can be disabled globally with PARSEC_DISABLE_WALLET_EXPORT=1
• Internal endpoints are never exposed through the MCP surface
• All connections use HTTPS/WSS

"PARSEC_API_KEY is required" — Set the environment variable in your MCP client configuration.

Tools not appearing — Restart your MCP client after configuration changes. Check that npx parsec-mcp serve runs successfully in your terminal.

Authentication errors — Verify your API key at parsecapi.com. Test keys (pk_test_...) work in sandbox mode only.

WebSocket session limit — Max 8 concurrent sessions. Close unused sessions with parsec.stream.close.

npm install
npm run build
npm test
npm run check          # build + test + contract tests
npm run eval:smoke     # smoke test harness

MIT