Skills/PyPI/mcpwright-census

mcpwright-census@0.1.3

VERIFIED· not started

Publisher claims: "MCP server for U.S. Census (ACS) data by ZIP code — income, age, housing, education — served from a local store. Needs a free Census API key." Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher mcpwright · publishing for 167 daysInstalls 124Last detonated 3d ago
$claude mcp add mcpwright-census -- uvx mcpwright-census
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Coverage

Not started: dependency install failed; the server itself was not observed.
Tested
the dependency install step · every file read, file written and host contacted by what ran
Not tested
server startup · the tool list · tool behavior

What this means for the label: Verified here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.

Before you give it your token

It will ask for
CENSUS_API_KEY
Where it talks to
no vendor host named in the codeAlso census.gov — not the publisher's domain; check what for before connecting.
What the honeypot saw
no credential files read · no network
What we could not test
server startup · the tool list · tool behavior

Connect it with a scoped credential, under the guard, and read the third-party hosts first. The code names census.gov as well as its own vendor. The guard injects CENSUS_API_KEY only into requests to the host you bind (and its subdomains) and refuses the rest.

$vet-skills run --net declared -- uvx mcpwright-census

Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.

Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios; not started: dependency install failed; the server itself was not observed) on 2026-11-11 and scored it 90/100 (Verified). In what ran, nothing we could detect went wrong: no undeclared network egress, no credential reads, no persistent instruction writes. What it does with a real credential was not observed; the static findings and the publisher carry the rest of the score. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 0 s · 2 scenarios · 0 deviations
t+CategoryObserved action
0.0sprocessno install scripts in bundle
0.1sprocessdependency install exit 1 ·
0.1sclaimednot started: dependency install failed (exit 1); the server itself was not observed
0.1sprocessscript backend runs setup only
0.1sprocessno install scripts to re-run

Static findings

HIGH
Hidden zero-width characters detectedsrc/census_mcp/places.py:253 · Hidden zero-width characters detected — may conceal contentheader = lines[0].lstrip("").split("|")Fix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
AST07

No other findings across 1,913 lines in 13 files.

Cost to the agent

Instructions loaded
≈74 tok
1 file · 13 in bundle
Tool list per prompt
≈0 tok
0 tools · 0 per tool
Handshake
no reply
launch to tools/list, stdio
Undocumented tools
0
description under 20 chars · avg 0

Tokens estimated at four characters each. The tool list is re-read by the agent on every turn, so it is the number to compare between servers that do the same job: ranked across the index.

Known vulnerabilities

No advisories in OSV for mcpwright-census@0.1.3 as of 3d ago. This is the package itself, not its dependencies.