`census_block`

Pack: fcc · Connect: https://pipeworx.io/mcp (see Connect below for a single-pack URL)

No MCP client? Call it directly: GET https://gateway.pipeworx.io/v1/tools/census_block for the schema, then POST the same URL with its arguments for the data.

Resolve a US latitude/longitude (decimal degrees) to its Census block, county, and state FIPS codes and names. Returns the 15-digit block FIPS, 5-digit county FIPS, 2-digit state FIPS, state code/name, and a bounding box. Pairs with the US Census API (FIPS codes are its join keys). Coordinates outside the US yield null FIPS values.

Parameters

Name	Type	Required	Description
`lat`	number	yes	Latitude in decimal degrees (e.g. 38.8976).
`lon`	number	yes	Longitude in decimal degrees (e.g. -77.0365).
`censusYear`	string	no	Census vintage for the block geography: “2020” (default) or “2010”.

Example call

Arguments

{
  "lat": 38.8976,
  "lon": -77.0365
}

curl

curl -X POST https://gateway.pipeworx.io/fcc/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"census_block","arguments":{"lat":38.8976,"lon":-77.0365}}}'

TypeScript (@pipeworx/sdk)

import { Pipeworx } from '@pipeworx/sdk';
const pipeworx = new Pipeworx();

const result = await pipeworx.call('census_block', {
  "lat": 38.8976,
  "lon": -77.0365
});

More examples

{
  "lat": 40.7128,
  "lon": -74.006,
  "censusYear": "2010"
}

Connect

Add this to your MCP client config — every tool in the catalog, including this one — or use one-click install buttons:

{
  "mcpServers": {
    "pipeworx": {
      "url": "https://pipeworx.io/mcp"
    }
  }
}

Connect to just the fcc pack

{
  "mcpServers": {
    "fcc": {
      "url": "https://gateway.pipeworx.io/fcc/mcp"
    }
  }
}

See Getting Started for client-specific install steps.

census_block