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mcp/harbor
Grok

groundhog.markets for Grok

markets.groundhog/weather

groundhog.markets: free weather forecasts in one call, plus Kalshi and Polymarket market rules.

client:Grok transport:streamable-http tools:9

Install groundhog.markets in Grok

.mcp.json (in your project root) 

{
  "mcpServers": {
    "weather": {
      "type": "http",
      "url": "https://groundhog.markets/mcp"
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

What Grok can do once it is connected

groundhog.markets in other clients

groundhog.markets MCP server