CodePostalPro for Grok
com.codepostalpro/postal-codes
Postal lookups for 120 countries with cited sources; deep US tier: demographics, climate, area codes
client:Grok
transport:streamable-http
tools:7
Install CodePostalPro in Grok
.mcp.json (in your project root)
{
"mcpServers": {
"postal-codes": {
"type": "http",
"url": "https://api.codepostalpro.com/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