Zip-Codes.com ZIP & Postal Code MCP Server

Location intelligence for US addresses and ZIP Codes, through the Model Context Protocol. Validate a messy US street address and get its ZIP+4 from current USPS data, updated monthly, so an agent looks addresses and ZIP Codes up instead of guessing them. Then go deeper: 14 years of normalized Census ACS data (2011–2024) across Census geographies, mapped districts and school districts. Survey estimates describe areas, not individuals, and carry margins of error.

ZIP boundaries follow USPS carrier routes and are refreshed quarterly. Coverage includes PO Box and single-organization ZIP Codes that Census ZIP-area files leave out. Boundary enrichments show which counties and districts a ZIP overlaps, with shares measured by area, alongside the USPS county assignment.

For history, Census TIGER/Line boundaries cover 2010–2025, and ACS field names stay consistent across releases, so a place can be compared year over year. Canadian postal codes, radius search, distance and fuzzy place search are included.

Remote only: connect to https://mcp.zip-codes.com/mcp over Streamable HTTP. Nothing to install. No key is needed for demo mode (deeper fields withheld except on demo codes and addresses); a free key sent as the X-Api-Key header gives 2,500 credits a day.