How do I get a HUD User Access Token?

Register for an account at the HUD User API page (https://www.huduser.gov/portal/dataset/uspszip-api.html), confirm your email, and generate a token in your user dashboard.

Which year of data is used?

By default, the API returns the most recent available data. You can optionally specify a year and quarter in each tool.

Does it support mapping Tracts back to ZIP codes?

Yes, tools like tract_to_zip and county_to_zip allow bidirectional crosswalking between geography IDs and ZIP codes.

HUD User (USPS Crosswalk) MCP Connector for Claude

A+

Map ZIP codes to Census geographies via HUD User USPS Crosswalk API.

10 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

Empower your AI agents to navigate US geography with precision. This MCP server connects to the HUD User Data API to provide crosswalks between USPS ZIP codes and Census Bureau geographies including Tracts, Counties, CBSAs, and Congressional Districts. Essential for urban planning, demographics analysis, and real estate data processing.

census-dataurban-planninggeocodingdemographicszip-code-mappingpublic-records

Connect to Claude

Subscribe on Vinkius, then add this connector to Claude.ai or Claude Code.

① Claude.ai (web app)

Go to Settings → Connectors → Add custom connector
Paste the MCP endpoint URL below

https://edge.vinkius.com/vk_preview_gUO1oRPrTtBUQovf2DmeB4W5Yeva5U9zago7jKzy/mcp

② Claude Code (terminal)

claude mcp add --transport http hud-user-usps-crosswalk https://edge.vinkius.com/vk_preview_gUO1oRPrTtBUQovf2DmeB4W5Yeva5U9zago7jKzy/mcp

③ Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "hud-user-usps-crosswalk": {
      "url": "https://edge.vinkius.com/vk_preview_gUO1oRPrTtBUQovf2DmeB4W5Yeva5U9zago7jKzy/mcp"
    }
  }
}

Get full access on Vinkius

The preview token above works for testing. Powered by Vinkius.