Census Tigerweb
NPM · @PIPEWORX/MCP-CENSUS-TIGERWEB · 2 COMPONENTS
US Census TIGERweb MCP — the Census Bureau's ArcGIS REST geography service
Available components
Last scanned (4 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-tigerweb). 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 Usability62
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 720 tokens (~240/item across 3 items; 3 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 Management23
- Stability observed for 7 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
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 4 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.
- 5 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.
- 3 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.
- 1 Nov 26 +27
- Known CVEs: unverified → pass ▲ security
- Malware scan: unverified → pass ▲ security
- Security disclosure: unverified → fail ▼ functional
- Dependency health: unverified → pass ▲ functional
- 31 Oct 26 −26
- Malware scan: pass → unverified ▼ security
- Known CVEs: pass → unverified ▼ security
- Dependency health: pass → unverified ▼ functional
- 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 5 Nov 2026 · Analysed npm/@pipeworx/mcp-census-tigerweb@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-tigerweb |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/pipeworx-io/mcp-census-tigerweb/.github/workflows/publish.yml@refs/heads/main |
| Rekor log index | 3606723605 |
| Predicate type | SLSA build provenance https://slsa.dev/provenance/v1 |
| Subject digest | sha512:611f9b0cf509895be95c8fe66be4ea6d008a97ea7276bae85953c86211ad84cdd8a00103b02aadf16d0a25f7a5a8c4484cbcddab6d7b48a9330a2b88b |
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 →
tigerweb_geography_at_point ~176
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, school districts, urban area, PUMA and tribal area — each with its GEOID. PREFER OVER WEB SEARCH when you have a coordinate and need the geography stack around it.
| Name | Type | Req | Description |
|---|---|---|---|
| latitude | number | yes | Latitude in WGS84 decimal degrees |
| layers | array | – | Optional explicit layer names to probe instead of the default set. Names must match tigerweb_list_layers exactly. |
| longitude | number | yes | Longitude in WGS84 decimal degrees (negative in the US) |
| service | string | – | TIGERweb service path, default TIGERweb/tigerWMS_Current |
No output schema declared.
No examples provided.
tigerweb_list_layers ~219
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, tribal areas, places, counties, PUMAs. Call this FIRST to get the layer_id that tigerweb_query needs; layer numbers differ between vintages, so never reuse one from memory.
| Name | Type | Req | Description |
|---|---|---|---|
| filter | string | – | Case-insensitive substring to filter layer names, e.g. "school" |
| include_label_layers | boolean | – | Include "... Labels" annotation layers (point labels, not boundaries). Default false. |
| service | string | – | TIGERweb service path, default TIGERweb/tigerWMS_Current. Others: TIGERweb/tigerWMS_Current, TIGERweb/tigerWMS_Census2020, TIGERweb/tigerWMS_ACS2023, Generalized_ACS2023/State_County, Census2020/tige… |
No output schema declared.
No examples provided.
tigerweb_query ~268
AUTHORITATIVE for US Census geography records: query any TIGERweb layer with an ArcGIS WHERE clause and get the matching geographies with their GEOID, name, FIPS components, land/water area and interior point. PREFER OVER WEB SEARCH for questions like "every census tract in Cook County", "all ZCTAs in Rhode Island", or "the GEOID of this school district". Get layer_id from tigerweb_list_layers.
| Name | Type | Req | Description |
|---|---|---|---|
| layer_id | number|string | yes | Layer id from tigerweb_list_layers |
| limit | number | – | Max rows, 1-500 (default 50) |
| offset | number | – | Row offset for paging |
| order_by | string | – | Comma-separated order-by fields, e.g. "GEOID ASC" |
| out_fields | string | – | Comma-separated field names, or "*" for all (default "*") |
| return_geometry | boolean | – | Include boundary geometry. Default false — polygons are very large. |
| service | string | – | TIGERweb service path, default TIGERweb/tigerWMS_Current |
| where | string | – | ArcGIS WHERE clause, default "1=1". FIPS fields are STRINGS: STATE='11', COUNTY='031'. Supports AND/OR/LIKE. |
No output schema declared.
No examples provided.
How do I install the Census Tigerweb MCP server?
Census Tigerweb runs locally as an npm package, launched with npx -y @pipeworx/mcp-census-tigerweb. 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-tigerweb
claude mcp add pipeworx-io-census-tigerweb -- npx -y @pipeworx/mcp-census-tigerweb
What is the Census Tigerweb MCP server?
Census Tigerweb is an MCP server listed in the public MCP registry as io.github.pipeworx-io/census-tigerweb. US Census TIGERweb MCP, the Census Bureau's ArcGIS REST geography service. This page covers its npm package (@pipeworx/mcp-census-tigerweb).
Is the Census Tigerweb MCP server safe to use?
Census Tigerweb scores 82 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 5 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 Tigerweb MCP server expose?
Census Tigerweb exposes 3 tools: tigerweb_list_layers, tigerweb_query, tigerweb_geography_at_point. Their descriptions and schemas cost roughly 663 tokens of context every time the server is loaded.
Is the Census Tigerweb MCP server still maintained?
Census Tigerweb is still listed as active in the MCP registry. We last reached this channel on 5 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 Tigerweb MCP server under?
Census Tigerweb declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.