MCP server

Census

io.github.cyanheads/census-mcp-server

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

Query U.S. Census Bureau data, variables, and geography via MCP.

Source

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

8

Token cost

About 9,313 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

25 Oct 2026, 20:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http census-mcp-server https://census.caseyjhand.com/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.census-mcp-server]
url = "https://census.caseyjhand.com/mcp"

Gemini CLI

{"mcpServers":{"census-mcp-server":{"httpUrl":"https://census.caseyjhand.com/mcp"}}}

Cursor

{"mcpServers":{"census-mcp-server":{"url":"https://census.caseyjhand.com/mcp"}}}

VS Code

{"servers":{"census-mcp-server":{"type":"http","url":"https://census.caseyjhand.com/mcp"}}}

Antigravity

agy mcp add census-mcp-server https://census.caseyjhand.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"census-mcp-server","server_url":"https://census.caseyjhand.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"census-mcp-server","server_url":"https://census.caseyjhand.com/mcp"}

Tools

• census_compare_geographies ~2348 tokens
  Compare one or more variables across multiple geographies at the same level — all counties in a state, all states nationally, or a named set of specific geographies — ranked on the value of one of them. Covers queries like "compare median income across WA counties" or "which states have the most peo
• census_get_variable ~583 tokens
  Fetch full metadata for one or more Census variable codes — label, concept group, predicate type, the table's universe, and margin-of-error sibling references. Use to confirm a variable code before building a query, or to look up what a known code means. On ACS datasets it returns estimate_code and
• census_list_datasets ~250 tokens
  Browse available Census Bureau datasets with their supported vintage years. Use as the starting point when the right dataset is unknown — ACS5, ACS1, and their profile, subject, and comparison tables, population estimates, the decennial census files, and the business datasets (County Business Patter
• census_list_geographies ~319 tokens
  List the geography levels available for a given Census dataset and year, along with the parent geographies each level requires. Use before querying to confirm that the target geography level exists — ACS1 omits many sub-state levels, and not all datasets support tracts or block groups. The geography
• census_list_predicate_values ~957 tokens
  List the codes a Census filter dimension accepts, so a predicates map can be written without guessing. Answers the question left open when census_query_data or census_compare_geographies reports that a dimension was left unset. Which route a dimension takes depends on the vintage: NAICS and POPGROUP
• census_query_data ~2612 tokens
  Query a Census dataset for one or more variables at a specific geography. Accepts FIPS codes for the target geography — use census_resolve_geography to convert place names to FIPS when needed. On ACS datasets, labeled estimates and margin-of-error values are returned together (the comparison profile
• census_resolve_geography ~1411 tokens
  Resolve a place name, ZIP code, or street address to Census FIPS identifiers. Converts names like "King County, WA", "Seattle, WA", or "Seattle-Tacoma-Bellevue, WA", and ZIPs like "98109", to the codes required by census_query_data and census_compare_geographies. Use before querying when you have a
• census_search_variables ~833 tokens
  Search Census variables by keyword across variable labels and concept groups, or look one up by its code. Returns variable codes with human-readable labels — use this to go from a concept like "median household income" to the variable code B19013_001E needed for data queries. A query that is one var

Browse

• GitHub tools
• GitHub and code hosting
• Government and public data
• Property

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