kestrel-feature-mcp@0.17.0
VERIFIED· not startedPublisher claims: "Model Context Protocol (MCP) server management for Kestrel Sovereign agents" 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
- no credential variables read in the code
- Where it talks to
- no vendor host named in the codeAlso docker.com, sandbox.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 under the guard. Not started: dependency install failed; the server itself was not observed. The code names no credential variable; the guard pins the network to what the honeypot saw and logs every call.
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 2026-11-12 and scored it 87/100 (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
# Use: docker run -p 8000:8000 supercorp/supergateway --stdio "mcp-server-xxx" --outputTransport streamableHttpFix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them."http://remote.example/mcp", "https://127.0.0.1/mcp", "https://169.254.169.254/mcp",Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.from kestrel_sovereign.storage.db.postgres import PostgresBackendFix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.result = subprocess.run(["node", "web/test-support/parent-browser-build.mjs"], cwd=REPOSITORY,Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out."file:///etc/passwd", "https:relative", "https://remote.example/mcp#fragment",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.result = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.names = subprocess.check_output(['git', 'ls-files', '-z'], cwd=repository).decode().split('\0')Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.self.process = subprocess.Popen(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.result = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out."https://user:[email protected]/mcp", "https://[not-ipv6]/mcp",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
No advisories in OSV for kestrel-feature-mcp@0.17.0 as of 2d ago. This is the package itself, not its dependencies.