postalref for Cursor

com.postalref/postalref

USPS package barcodes, service type codes and mailing terms, each cited to its USPS source.

client:Cursor transport:streamable-http tools:8

Install postalref in Cursor

~/.cursor/mcp.json · windows: %USERPROFILE%\.cursor\mcp.json

{
  "mcpServers": {
    "postalref": {
      "url": "https://postalref.com/mcp"
    }
  }
}

Use .cursor/mcp.json in a project root instead to scope it to that project. Cursor merges both. Cursor docs