loc8n Geographic Data

@gener8v/mcp-geographic-data

MCP server for the loc8n Geographic Data API. Exposes U.S. demographics, housing, mortgage, migration, employment, and geographic data as tools for any MCP-compatible client (Claude Desktop, Claude Code, Cursor, etc.).

Quick Start

npm install -g @gener8v/mcp-geographic-data

Set your API key:

export LOC8N_API_KEY="your-api-key"

Get a key at loc8n.com.

Usage

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "geographic-data": {
      "command": "mcp-geographic-data",
      "env": {
        "LOC8N_API_KEY": "your-api-key"
      }
    }
  }
}

Claude Code

Add to your project's .mcp.json:

{
  "mcpServers": {
    "geographic-data": {
      "command": "mcp-geographic-data",
      "env": {
        "LOC8N_API_KEY": "your-api-key"
      }
    }
  }
}

Hosted SSE (no install required)

Connect any MCP-compatible client directly to the hosted server at mcp.loc8n.com. Pass your API key as a query parameter or Authorization header:

SSE endpoint: https://mcp.loc8n.com/sse?apiKey=YOUR_API_KEY

Or with a Bearer token:

GET https://mcp.loc8n.com/sse
Authorization: Bearer YOUR_API_KEY

Each connection gets an isolated session — your API key is used for all requests and usage is tracked against your account.

Cursor

Add to your Cursor MCP settings:

{
  "mcpServers": {
    "geographic-data": {
      "url": "https://mcp.loc8n.com/sse?apiKey=YOUR_API_KEY"
    }
  }
}

Windsurf

Add to ~/.codeium/windsurf/mcp_config.json:

{
  "mcpServers": {
    "geographic-data": {
      "serverUrl": "https://mcp.loc8n.com/sse?apiKey=YOUR_API_KEY"
    }
  }
}

Self-Hosted SSE

Run the server locally for development or custom deployments:

mcp-geographic-data --transport sse --port 3100

Endpoints:

• SSE: http://localhost:3100/sse
• Messages: http://localhost:3100/messages
• Health: http://localhost:3100/health

Tools (23)

Geographic Lookup

Tool	Description
lookup_zip_code	Get details for a ZIP code (city, county, state, coordinates)
search_zip_codes_by_city	Find ZIP codes for a city/state
find_zip_codes_in_radius	Find ZIP codes within a radius of a point
calculate_zip_code_distance	Calculate distance between two ZIP codes
search_areas	Search counties, states, or metro areas by name

Demographics

Tool	Description
get_demographics	Full demographic profile (population, income, education, etc.)
get_demographics_category	Single demographic category in detail
get_demographics_trend	Year-over-year demographic trends
compare_demographics	Side-by-side comparison of two areas

Housing & Market Data

Tool	Description
get_fair_market_rent	HUD Fair Market Rent by bedroom count
get_fmr_trend	Fair Market Rent trends over time

Mortgage & Lending

Tool	Description
get_mortgage_summary	HMDA mortgage origination summary
get_mortgage_trends	Mortgage lending trends over time
compare_mortgage	Side-by-side mortgage comparison of two areas

Migration

Tool	Description
get_migration_summary	IRS SOI migration inflows/outflows
get_migration_flows	Top origin/destination flows for an area
get_migration_trends	Migration trends across year pairs

Employment

Tool	Description
get_employment	LODES employment profile (jobs, sectors, wages)
get_employment_trend	Employment trends over time
compare_employment	Side-by-side employment comparison
get_commute_flows	Top commute origins/destinations

Geocoding

Tool	Description
geocode_address	Convert address to coordinates and FIPS codes
reverse_geocode	Convert coordinates to address and area identifiers

Resources (7)

URI	Description
data://demographics/available-years	Available years for ACS demographics data
data://fmr/available-years	Available years for HUD Fair Market Rent data
data://mortgage/available-years	Available years for HMDA mortgage data
data://migration/available-years	Available year pairs for IRS migration data
data://employment/available-years	Available years for LODES employment data
data://tiers	Subscription tier definitions and permissions
data://auth/context	Current API key tier, permissions, and rate limits

Environment Variables

Variable	Required	Default	Description
LOC8N_API_KEY	Yes	—	API key for the loc8n Geographic Data API
LOC8N_API_BASE_URL	No	https://api.loc8n.com	API base URL

CLI Options

mcp-geographic-data [options]

  --transport <stdio|sse>  Transport protocol (default: stdio)
  --port <number>          Port for SSE transport (default: 3100)
  --help, -h               Show help

License

MIT