Census Tigerweb

liveGovernmentGeography

US Census TIGERweb MCP — the Census Bureau's ArcGIS REST geography service

3tools
0msauth
free tier50 calls/day

Tools

tigerweb_list_layers

List the queryable TIGER/Line geography layers in a Census TIGERweb ArcGIS service — census tracts, block groups, 2020 blocks, ZCTAs, congressional and state legislative districts, school districts, t

No parameters required.

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tigerweb_query

Queries any Census TIGERweb geography layer by WHERE clause, returning the matching tracts, ZCTAs, districts or places with GEOIDs.

No parameters required.

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tigerweb_geography_at_point

Given a latitude/longitude in the United States, return every TIGER/Line geography containing it in one call — state, county, census tract, block group, 2020 block, ZCTA, place, county subdivision, sc

No parameters required.

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Test with curl

The gateway speaks JSON-RPC 2.0 over HTTP POST. You can test any pack directly from the terminal.

List available tools
bash
curl -X POST https://gateway.pipeworx.io/census-tigerweb/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'
Call a tool
bash
curl -X POST https://gateway.pipeworx.io/census-tigerweb/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"tigerweb_list_layers","arguments":{}}}'

Use with the SDK

Install @pipeworx/sdk to call tools from any TypeScript/Node project.

TypeScript
import { Pipeworx } from '@pipeworx/sdk';
const px = new Pipeworx();
const result = await px.call("tigerweb_list_layers", {});
ask_pipeworx
// Or ask in plain English:
const answer = await px.ask("us census tigerweb mcp — the census bureau's arcgis rest geography service");