Census
NPM · @PIPEWORX/MCP-CENSUS · 2 COMPONENTS
Census MCP — U.S. Census Bureau housing-relevant APIs.
Available components
Last scanned (21 hours ago)
Scores higher than 72% of npm servers
Category Maps and Location
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security100
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- No production dependencies, so there is no dependency health to assess. View diagnostics → Pass
Provenance & Transparency97
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to pipeworx-io/mcp-census). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 4 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability63
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 1061 tokens (~176/item across 6 items; 6 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management20
- Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (17% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 6 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 7 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.
- 2 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.
- 1 Nov 26 +15
- Malware scan: unverified → pass ▲ security
- Security disclosure: unverified → fail ▼ functional
- 31 Oct 26 −14
- Malware scan: pass → unverified ▼ security
- Security disclosure: fail → unverified ▼ functional
- Package version: 0.2.0 → 0.2.1 functional
- 29 Oct 26 79
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 4 Nov 2026 · Analysed npm/@pipeworx/mcp-census@0.2.1
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | pipeworx-io/mcp-census |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/pipeworx-io/mcp-census/.github/workflows/publish.yml@refs/heads/main |
| Rekor log index | 3606716186 |
| Predicate type | SLSA build provenance https://slsa.dev/provenance/v1 |
| Subject digest | sha512:99df4918e9026a91958a4ce9ef3a4ab465776766595819b71e0cc2999e0d47730ad1c73aa874d56653990fcea02df948d3a0af55c54f7a8e0c9f994a8 |
Background: How many MCP packages publish verified provenance →
Dependencies 0 packages
| Packages resolved | 0 |
|---|---|
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
census_acs ~334
Median home value and median rent for a US ZIP CODE, city, town, county or state, from the American Community Survey — the keyless way to answer "what do homes cost in 33158" or "median home price in Miami-Dade County" at a grain below metro level. Pass the geography the way a person says it: a 5-digit ZIP ("33158"), a place with its state ("Palmetto Bay, FL"), a county ("Miami-Dade County, FL"), or a state ("Florida"); FIPS codes and raw Census "for" syntax also work. Median home value is B25077_001E and median gross rent is B25064_001E (B25003 is tenure counts, not rent); the same call also serves ownership rates, vacancy and any other ACS variable code. Values are 5-year survey estimates, so they describe a period rather than this month's asking prices.
| Name | Type | Req | Description |
|---|---|---|---|
| _apiKey | string | yes | Census API key |
| geography | string | yes | Geographic level and filter using Census "for" syntax (e.g., "state:06" for California, "county:*" for all counties, "state:*" for all states, "county:037&in=state:06" for LA County). |
| variables | string | yes | Comma-separated variable codes to retrieve (e.g., "NAME,B25001_001E,B25077_001E"). Always include NAME for place names. |
| year | number | – | Survey year (default 2022). ACS 5-year estimates available from 2009 onward. |
No output schema declared.
No examples provided.
census_available_datasets ~66
Discover Census datasets and their variables. Returns dataset names, descriptions, and variable codes (e.g., B25001_001E) for querying with other census tools.
| Name | Type | Req | Description |
|---|---|---|---|
| _apiKey | string | – | Census API key (not required for this endpoint but accepted for consistency) |
No output schema declared.
No examples provided.
census_building_permits ~134
Check monthly building permits for new residential construction by geography. Returns count of authorized privately-owned housing units and construction activity trends.
| Name | Type | Req | Description |
|---|---|---|---|
| _apiKey | string | – | Census API key |
| category_code | string | – | APERMITS (annual rate, default) or PERMITS (monthly level). Pass "ALL" to get every residential-construction series for the month. |
| time | string | – | Month as "YYYY-MM" (e.g. "2026-04"), or "from 2026-01 to 2026-04" for a range. Defaults to the latest published month. |
No output schema declared.
No examples provided.
census_homeownership ~106
US homeownership rate and housing vacancy rates by quarter, from the Census Housing Vacancy Survey (HVS) — the official source. Returns `headline` (the national homeownership rate as a percent) plus the rental and homeowner vacancy rates. Defaults to the latest published quarter.
| Name | Type | Req | Description |
|---|---|---|---|
| _apiKey | string | – | Census API key |
| time | string | – | Quarter as "YYYY-QN" (e.g. "2026-Q1"). Defaults to the latest published quarter. |
No output schema declared.
No examples provided.
census_housing_starts ~130
Get residential construction pipeline by geography: new starts, units under construction, and completed units. Returns housing supply and activity trends.
| Name | Type | Req | Description |
|---|---|---|---|
| _apiKey | string | – | Census API key |
| category_code | string | – | ASTARTS (annual rate, default), STARTS, COMPLETIONS, UNDERCONST, AUTHNOTSTD, or "ALL". |
| time | string | – | Month as "YYYY-MM" (e.g. "2026-04"), or "from 2026-01 to 2026-04" for a range. Defaults to the latest published month. |
No output schema declared.
No examples provided.
census_population ~240
HOW MANY PEOPLE LIVE somewhere in the United States — the population of a county, city, town, ZIP code or state from the American Community Survey. Answers "population of Travis County Texas", "how many people live in Austin", "what is the population of 78701", "Ohio population". Say the place the way a person says it ("Travis County, TX", "Austin, TX", "78701", "Texas"); no FIPS codes and no variable codes needed. Also returns median age, household count and median household income for the same place when the survey publishes them. Figures are 5-year survey estimates, so they describe a period rather than a census-day headcount. For what homes cost or rent there, use census_acs.
| Name | Type | Req | Description |
|---|---|---|---|
| _apiKey | string | – | Census API key |
| place | string | yes | The place, in plain English: "Travis County, TX", "Austin, TX", "78701", "Texas". A county or place name works best with its state. |
| year | number | – | ACS 5-year survey year (default 2022; available from 2009). |
| Name | Type | Req | Description |
|---|---|---|---|
| estimate_note | string | – | – |
| found | boolean | yes | – |
| households | number | – | – |
| median_age | number | – | – |
| median_household_income_usd | number | – | – |
| place | string | yes | – |
| population | number | yes | – |
| source | string | yes | – |
| year | number | yes | – |
No examples provided.
How do I install the Census MCP server?
Census runs locally as an npm package, launched with npx -y @pipeworx/mcp-census. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · @pipeworx/mcp-census
claude mcp add pipeworx-io-census -- npx -y @pipeworx/mcp-census
What is the Census MCP server?
Census is an MCP server listed in the public MCP registry as io.github.pipeworx-io/census. Census MCP, U.S. Census Bureau housing-relevant APIs. This page covers its npm package (@pipeworx/mcp-census).
Is the Census MCP server safe to use?
Census scores 82 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 4 November 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Census MCP server expose?
Census exposes 6 tools: census_population, census_acs, census_building_permits, census_housing_starts, census_homeownership, census_available_datasets. Their descriptions and schemas cost roughly 1,010 tokens of context every time the server is loaded.
Is the Census MCP server still maintained?
Census is still listed as active in the MCP registry. We last reached this channel on 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the Census MCP server under?
Census declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.