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Option 1: Plugin install

claude plugin install rekko
This registers the MCP server automatically.

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Option 2: Manual configuration

Add to your project’s .mcp.json or ~/.claude/mcp.json: 
{
  "mcpServers": {
    "rekko": {
      "command": "uvx",
      "args": ["rekko-mcp"],
      "env": {
        "REKKO_API_KEY": "rk_free_your_key_here"
      }
    }
  }
}

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Verify

Start Claude Code and ask a natural language question: 
What are the top prediction markets right now?
You should see Rekko tools (mcp__rekko__list_markets, etc.) being called automatically.

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Example prompts

  • “What are the top prediction markets right now?”
  • “Analyze the Fed rate decision market on Kalshi”
  • “Find arbitrage opportunities above 3% spread”
  • “Screen the top 50 Kalshi markets and analyze anything actionable”
  • “Show my shadow portfolio performance”

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Environment variables

VariableRequiredDescription
REKKO_API_KEYYesYour Rekko API key
REKKO_API_URLNoCustom base URL (default: https://api.rekko.ai)