Skills/PyPI/montycat-mcp

montycat-mcp@1.1.6

VERIFIED· not started

Publisher claims: "Shared, persistent memory for AI agents: a self-hosted MCP server with semantic search." Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher montygovernance · publishing for 79 daysInstalls 1,199Last detonated 3d ago
$claude mcp add montycat-mcp -- uvx montycat-mcp
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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
MONTYCAT_PASSWORDConfiguration, not credentials: MEMOCAT_READY_TIMEOUT, MONTYCAT_DEFAULT_KEYSPACE, MONTYCAT_HOST, MONTYCAT_PORT, MONTYCAT_READY_TIMEOUT, MONTYCAT_SCOPE, MONTYCAT_SCOPE_PREFIX, MONTYCAT_SHARED_KEYSPACE, MONTYCAT_STORE, MONTYCAT_URI, MONTYCAT_USERNAME, ProgramFiles
Where it talks to
no vendor host named in the codeAlso montygovernance.com — 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 montygovernance.com as well as its own vendor. The guard injects MONTYCAT_PASSWORD only into requests to the host you bind (and its subdomains) and refuses the rest.

$vet-skills run --net declared -- uvx montycat-mcp

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 80/100 (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

MEDIUM
Python subprocess execution detectedmontycat_mcp/bootstrap.py:725 · Python subprocess execution detectedlambda: subprocess.run(command, capture_output=True, timeout=30).returncode == 0Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
HIGH
Privileged sudo commandmontycat_mcp/bootstrap.py:62 · Privileged sudo command — agent may execute with elevated privileges"| sudo tee /etc/apt/sources.list.d/montycat.list > /dev/null "Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
HIGH
Privileged sudo commandmontycat_mcp/bootstrap.py:59 · Privileged sudo command — agent may execute with elevated privileges"| sudo gpg --dearmor -o /usr/share/keyrings/montycat-archive-keyring.gpg "Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Access to sensitive file pathscompose.yaml:36 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesMONTYCAT_PASSWORD: ${MONTYCAT_PASSWORD:?set MONTYCAT_PASSWORD in .env}Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Privileged sudo commandmontycat_mcp/bootstrap.py:63 · Privileged sudo command — agent may execute with elevated privileges"&& sudo apt update && sudo apt install -y montycat-semantic"Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Python subprocess execution detectedmontycat_mcp/bootstrap.py:816 · Python subprocess execution detectedsubprocess.Popen( # noqa: S603 - our own verified binaryFix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Access to sensitive file pathscompose.yaml:8 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesMONTYCAT_PASSWORD: ${MONTYCAT_PASSWORD:?set MONTYCAT_PASSWORD in .env}Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Python subprocess execution detectedmontycat_mcp/bootstrap.py:763 · Python subprocess execution detectedlambda: subprocess.run(args, capture_output=True, timeout=120).returncode == 0Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedmontycat_mcp/bootstrap.py:504 · Python subprocess execution detectedcompleted = subprocess.run( # noqa: S603 - our own verified binaryFix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
HIGH
Privileged sudo commandmontycat_mcp/bootstrap.py:782 · Privileged sudo command — agent may execute with elevated privilegesasks for administrator consent (or, on Linux, runs `sudo apt install`), andFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Python subprocess execution detectedmontycat_mcp/bootstrap.py:853 · Python subprocess execution detectedexisting = subprocess.run( # noqa: S603Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Process kill commandmontycat_mcp/watch.py:140 · Process kill command — agent can terminate processespass # a broken notifier must not kill the subscriptionFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Privileged sudo commandtests/test_bootstrap_unit.py:619 · Privileged sudo command — agent may execute with elevated privileges`sudo apt install`. Neither may happen just because a chat client started."""Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05

Cost to the agent

Instructions loaded
≈58 tok
1 file · 40 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 montycat-mcp@1.1.6 as of 3d ago. This is the package itself, not its dependencies.