portunusmcp-sentinel@1.4.0
VERIFIED· not startedPublisher claims: "Build-time security scanner for MCP servers" Observed in sandbox: no network, touches nothing outside the project, writes no memory.
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
OPENAI_API_KEY- Where it talks to
- no vendor host named in the codeAlso oasis-open.org, mcp-sentinel.invalid — 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 oasis-open.org, mcp-sentinel.invalid as well as its own vendor. The guard injects OPENAI_API_KEY only into requests to the host you bind (and its subdomains) and refuses the rest.
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 82/100 (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 deviationsStatic findings
- pattern: subprocess.run(..., shell=True, ...)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.or (path.name == ".env" or path.name.startswith(".env."))Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.result = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.- pattern: subprocess.call(..., shell=True, ...)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.- pattern: subprocess.Popen(..., shell=True, ...)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.return subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.completed = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.processes[rule] = subprocess.Popen(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.# Sample while stdio is still attached, before scanner shutdown can kill it.Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.return OutputFormat.JSON if json_output else output_formatFix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.return environment and bool(re.fullmatch(r"process\.env\.[A-Z_][A-Z_0-9]*", text))Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.Cost to the agent
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
Not checked against OSV yet; the weekly check has not reached this version.