Skills/PyPI/p6plab-mcp-calculator

p6plab-mcp-calculator@2.0.1

CAUTION· not started

Publisher claims: "Scientific Calculator MCP Server - Comprehensive mathematical computation service for AI assistants" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher peepeepopapapeepeepo · publishing for 434 daysInstalls 66Last detonated 6 h ago
What would fix thisWatchDispute verdict

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: Caution 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
CALCULATOR_CURRENCY_API_KEYTWINE_PASSWORDConfiguration, not credentials: CALCULATOR_CURRENCY_CACHE_HOURS, CALCULATOR_ENABLE_CURRENCY_CONVERSION, CALCULATOR_PRECISION, NEW_PATCH, RESULTS_DIR
Where it talks to
no vendor host named in the codeAlso exchangerate-api.com, astral.sh — 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 exchangerate-api.com, astral.sh as well as its own vendor. The guard injects CALCULATOR_CURRENCY_API_KEY, TWINE_PASSWORD only into requests to the host you bind (and its subdomains) and refuses the rest.

$vet-skills run --net declared -- uvx p6plab-mcp-calculator

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 2026-11-14 and scored it 79/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Pipe-to-shell pattern. 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

LOW
Context shift attemptREADME.md:1108 · Context shift attempt — trying to change operational mode · informational: not an instruction file# Enable debug modeFix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
LOW
Context shift attemptdocs/troubleshooting.md:704 · Context shift attempt — trying to change operational mode · informational: not an instruction file### 1. Enable Debug ModeFix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
MEDIUM
Python subprocess execution detectedscripts/deployment/test-deployment-validation.py:41 · Python subprocess execution detectedresult = subprocess.run([Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Remote installer piped to shellscripts/deployment/test-uvx-install.sh:23 · Remote installer piped to shellecho " curl -LsSf https://astral.sh/uv/install.sh | sh"Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST07
MEDIUM
Python subprocess execution detectedscripts/deployment/test-deployment-validation.py:33 · Python subprocess execution detectedsubprocess.run(["rm", "-rf", str(temp_dir)], check=False)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedscripts/deployment/test-deployment-validation.py:74 · Python subprocess execution detectedsubprocess.run([Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedscripts/deployment/test-deployment-validation.py:89 · Python subprocess execution detectedsubprocess.run([Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedscripts/deployment/test-deployment-validation.py:94 · Python subprocess execution detectedsubprocess.run([Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
LOW
Context shift attemptdocs/security.md:557 · Context shift attempt — trying to change operational mode · informational: not an instruction file### 1. Enable Debug ModeFix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
CRITICAL
Pipe-to-shell patternscripts/deployment/test-uvx-install.sh:23 · Pipe-to-shell pattern — downloads and immediately executes remote codeecho " curl -LsSf https://astral.sh/uv/install.sh | sh"Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST06

Cost to the agent

Instructions loaded
≈66 tok
1 file · 81 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 p6plab-mcp-calculator@2.0.1 as of 6 h ago. This is the package itself, not its dependencies.

What would make this Verified

1 point to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%
  1. Pipe-to-shell pattern≈ +9 on the totalBuild commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
  2. Unclaimed publisher≈ +8 on the totalClaim peepeepopapapeepeepo: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
  3. Python subprocess execution detected≈ +2 on the totalBuild commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
  4. Remote installer piped to shell≈ +2 on the totalBuild commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
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