Query U.S. Census Bureau data, variables, and geography via MCP.
cyanheads/census-mcp-server is an MCP server distributed on github, maintained by cyanheads, tracked here since June 2026. It has shipped 20 releases and exposes 7 tools. Tools include census_compare_geographies, census_get_variable, census_list_datasets, census_list_geographies, census_query_data, census_resolve_geography, and 1 more. Its composite risk grade is B — an inferred review prompt computed from observed signals, not a verdict.
Reading the source raised one review prompt — exfiltration combo — each a pattern worth a human look rather than a finding of fault.
Since the previous scan on 2026-08-30: 7 tools added and 7 tools removed.
full security breakdown →-
census_compare_geographiesCompare one or more variables across multiple geographies at the same level — all counties in a state, all states nationally, or a named se… -
census_get_variableFetch full metadata for one or more Census variable codes — label, concept group, predicate type, universe, and margin-of-error sibling ref… -
census_list_datasetsBrowse available Census Bureau datasets with their supported vintage years. Use as the starting point when the right dataset is unknown — A… -
census_list_geographiesList the geography levels available for a given Census dataset and year, along with the parent geographies each level requires. Use before … -
census_query_dataQuery a Census dataset for one or more variables at a specific geography. Accepts FIPS codes for the target geography — use census_resolve_… -
census_resolve_geographyResolve a place name or street address to Census FIPS identifiers (state, county, tract codes). Converts names like "King County, WA" or "S… -
census_search_variablesSearch Census variables by keyword across variable labels and concept groups. Returns variable codes with human-readable labels — use this …
06-13 00:00 07-27 00:00 now
| version | date | src |
|---|---|---|
| v0.3.3 | 2026-08-25 | github |
| v0.3.2 | 2026-07-31 | github |
| v0.3.1 | 2026-07-31 | github |
| v0.3.0 | 2026-07-31 | github |
| v0.2.0 | 2026-07-31 | github |
| v0.1.14 | 2026-07-31 | github |
| v0.1.13 | 2026-07-31 | github |
| v0.1.12 | 2026-07-31 | github |
| v0.1.11 | 2026-06-20 | github |
| v0.1.10 | 2026-06-12 | github |