Datum Property Intelligence MCP

Which US county is this address in, and who lives there? An MCP server that gives AI agents county, state and Census GEOIDs for any US coordinate, plus population and median household income for that county, from official US Census Bureau data. Every answer says exactly which dataset and which release it came from, so your agent can cite it.

• Two tools, built for agents: clear inputs (latitude and longitude), small JSON answers, and errors that say what to do next.
• Official data, held and served directly: Census TIGER/Line 2024 boundaries and American Community Survey 2018–2022 5-year estimates. No scraping, no third-party API in the path.
• Provenance on every answer: each response lists its sources with the dataset version and retrieval date.
• Pay only for answers: $0.01 per demographics lookup, county lookups free, nothing charged for errors.

Tools and pricing

Tool	What it answers	Price per call
admin_areas	State and county containing a point, each with its Census GEOID	Free
area_demographics	Population and median household income for the county containing a point (or a five-digit county GEOID)	$0.01

Pay-per-event pricing:

• $0.01 per successful area_demographics call ($10 per 1,000).
• admin_areas is free, so an agent can resolve a location before deciding whether it needs the paid lookup.
• No charge for errors: an invalid coordinate, a point outside the US, or a county with no published estimate costs nothing.
• No charge for listing the tools or connecting.
• $0.00005 per Actor start. The server starts when the first request arrives and then serves many calls, so this is a fraction of a cent per session.
• Platform usage is included in the prices above.

How to connect

The MCP endpoint (Streamable HTTP) is:

https://kohjpyrumr4p27cv8.apify.actor/mcp

Every request needs your Apify API token (Apify Console → Settings → API & Integrations).

Claude Code

claude mcp add --transport http datum-property https://kohjpyrumr4p27cv8.apify.actor/mcp \
  --header "Authorization: Bearer YOUR_APIFY_TOKEN"

Any MCP client that can send headers: use the URL above and send Authorization: Bearer YOUR_APIFY_TOKEN.

Clients that cannot send headers: append ?token=YOUR_APIFY_TOKEN to the URL. This works, but the token then sits in the client's configuration and possibly its logs, so prefer the header where you can.

Then ask your agent things like:

1. "What county is 39.1582, -75.5244 in?"
2. "What's the median household income around 18.4655, -66.1057?"
3. "Compare the population of the counties containing these three coordinates."

Example

area_demographics with { "lat": 39.1582, "lon": -75.5244 } (Dover, Delaware) returns, shortened:

{
  "data": {
    "area": { "geoid": "10001", "level": "county", "name": "Kent County" },
    "metrics": [
      { "metric": "population", "value": 182400, "unit": "people", "period": "2022-5yr" },
      { "metric": "median_household_income", "value": 69278, "unit": "USD", "period": "2022-5yr" }
    ]
  },
  "sources": [
    {
      "name": "U.S. Census Bureau TIGER/Line",
      "dataset_version": "tiger_counties@2024",
      "licence": "public-domain"
    },
    {
      "name": "U.S. Census Bureau American Community Survey",
      "dataset_version": "acs_county_profile@2022-5yr",
      "attribution": "Source: U.S. Census Bureau, American Community Survey 5-Year Estimates"
    }
  ]
}

admin_areas for the same point returns Kent County (GEOID 10001) and Delaware (GEOID 10). The GEOID is the key every other Census dataset uses, so it is the right first call before any further Census lookup.

Coverage and data notes

• Coverage: all US counties and county equivalents in the 50 states, the District of Columbia and Puerto Rico. For Guam and the other island areas, admin_areas returns the county but area_demographics has no estimates, because the American Community Survey does not cover them.
• Releases: boundaries from TIGER/Line 2024; demographics from the ACS 2018–2022 5-year estimates. Each answer names the release in dataset_version and each value's period.
• Estimates, not counts: ACS values are survey estimates with margins of error. A value the Census Bureau suppressed comes back as null, never filled in.
• Points on a county line are inside both counties, so both are returned, most specific first. Take the first if you need one answer.
• County level today. Tract and ZIP-code (ZCTA) answers are not yet available.

FAQ

Is the data free to use? Census TIGER/Line and ACS data are works of the US federal government and are not subject to copyright (17 U.S.C. §105). You pay for the hosted, agent-ready service, not for the data. Keep the attribution in sources[] when you show the numbers.

How fresh is it? Census publishes these releases yearly. When a new release is loaded, dataset_version changes, so you can tell exactly which one answered.

What if something looks wrong? Open an issue on the Issues tab of this Actor with the coordinate and the request_id from the response.

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.