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mcp/harbor
Grok

reference data for Grok

dev.usaref/reference-data

N American govt data, cited to source: rates, VAT, tax, wages, holidays, FX. 10 countries; USA free.

client:Grok transport:streamable-http tools:11

Install reference data in Grok

.mcp.json (in your project root) 

{
  "mcpServers": {
    "reference-data": {
      "type": "http",
      "url": "https://usaref.dev/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

reference data in other clients

reference data MCP server