FIPS County Code Lookup — 3,231 US Counties MCP Server

@easysolutions906

Basic information

About FIPS County Code Lookup — 3,231 US Counties MCP Server

Look up US county FIPS codes. Search by code, county name, or state. 3,231 counties. Used by mortgage, title, GIS, and government platforms.

#fips#counties#mortgage #gis #mcp

FIPS County Code Lookup — 3,231 US Counties MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "fips": {
      "command": "npx",
      "args": [
        "-y",
        "@easysolutions906/mcp-fips"
      ]
    }
  }
}

FIPS County Code Lookup — 3,231 US Counties MCP Server tools

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Overview

What is FIPS County Code Lookup?

FIPS County Code Lookup is an MCP (Model Context Protocol) server for retrieving US county information by FIPS code, county name, or state. It covers all 50 states, Washington D.C., and U.S. territories. The server is built for developers using MCP-compatible clients like Claude Desktop and Cursor, and also exposes a REST API for direct HTTP access.

How to use FIPS County Code Lookup?

Install via npx @easysolutions906/mcp-fips and configure the server in your MCP client’s configuration file (e.g., claude_desktop_config.json or .cursor/mcp.json). Four MCP tools are available: fips_lookup, fips_search, fips_state, and fips_stats. Optionally, set the PORT environment variable to run the server in HTTP mode, which provides REST endpoints for lookups, search, state listing, batch operations, and statistics.

Key features of FIPS County Code Lookup

Lookup county by 5-digit FIPS code.
Search counties by name with optional state filter.
List all counties in a state by FIPS code or abbreviation.
Retrieve database statistics and county counts per state.
Supports both stdio (MCP) and HTTP (REST API) transports.

Use cases of FIPS County Code Lookup

Verify the county name corresponding to a known FIPS code.
Find all counties in a state by providing the state code.
Search for a county when only the name is known, optionally narrowing by state.
Batch lookup multiple FIPS codes in a single HTTP request.
Quickly obtain summary statistics of the county dataset.

Frequently asked questions

What data source does the server use?

The server uses US Census Bureau FIPS county codes. You can regenerate the data by running `npm run build-data` to pull the latest census information.

Can I run FIPS County Code Lookup as an HTTP server?

Yes. Set the `PORT` environment variable to start the server in Streamable HTTP mode. The REST endpoints are documented in the README.

Which MCP clients are supported?

The server is tested with Claude Desktop and Cursor, configured via their respective `mcpServers` configuration files.

How many counties are covered?

The dataset includes all 50 states, Washington D.C., and U.S. territories, totaling 3,231 counties.

What transport options are available?

The default transport is stdio for use with MCP clients. HTTP transport is available by setting the `PORT` environment variable.

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