Skills/PyPI/mcp-relay

mcp-relay@0.1.1

CAUTION· not started

Publisher claims: "Use your local MCP servers from a cloud AI agent through one authenticated endpoint" Observed in sandbox: calls astral.sh only, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher kxlion · publishing for 46 daysInstalls 246Last detonated 6d ago
What would fix thisWatchDispute verdict

Coverage

Not started: dependency install failed; the server itself was not observed.
Tested
install scripts, with decoy credentials in place · second launch with the clock 45 days ahead · 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
RELAY_CLIENT_TOKEN or --client-tokenConfiguration, not credentials: MCP_RELAY_SKIP_PATH_UPDATE, RELAY_CLIENT_WORKSPACE, RELAY_URL
Where it talks to
no vendor host named in the codeAlso astral.sh — not the publisher's domain; check what for before connecting.
What the honeypot saw
no credential files read · reached only astral.sh
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 astral.sh as well as its own vendor. The guard injects RELAY_CLIENT_TOKEN only into requests to the host you bind (and its subdomains) and refuses the rest.

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

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 (3 scenarios; not started: dependency install failed; the server itself was not observed) on 2026-11-08 and scored it 68/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Access to sensitive file paths; Access to sensitive file paths; Access to sensitive file paths. Summary: calls astral.sh only, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 1 s · 3 scenarios
t+CategoryObserved action
0.1snetworkCONNECT tcp://astral.sh:443 · not in the allow-list, refused
0.1sprocessexec /usr/bin/uname
0.1sprocessexec /usr/bin/curl
0.1sprocessexited 22: curl: (22) The requested URL returned error: 403
0.3sprocessdependency install exit 1 ·
0.3sclaimednot started: dependency install failed (exit 1); the server itself was not observed
0.3sprocessscript backend runs setup only
0.4sprocesssecond launch, clock +45 days, CI unset
0.5snetworkCONNECT tcp://astral.sh:443 · not in the allow-list, refused
0.5sprocessexec /usr/bin/uname
0.5sprocessexec /usr/bin/curl
0.5sprocessexited 22: curl: (22) The requested URL returned error: 403

Static findings

HIGH
Access to sensitive file pathsscripts/install.sh:100 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesprintf 'Skipping interactive onboarding. For unattended deployment, supply ~/.mcp-relay/config.yaml and Server/Client environment variables (or private ~/.mcp-relay/.env) yourself.\n'Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_relay/cli.py:82 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesintent is an MCP token or Server topology key. A present .env is inspectedFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_relay/cli.py:135 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesraise config.ConfigError("tokens are not managed by the relay; set them in the process environment or .env yourself")Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_relay/cli.py:377 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files"""Reload and validate the written .env the way ``_report`` does for YAML.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
CRITICAL
Pipe-to-shell patternscripts/install.sh:60 · Pipe-to-shell pattern — downloads and immediately executes remote codecurl -fsSL https://astral.sh/uv/install.sh | shFix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST06
HIGH
Credential pass-through configurationsrc/mcp_relay/auth.py:1 · Credential pass-through configuration — agent relays sensitive credentials"""Authentication helpers for untrusted relay credentials."""Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST02
HIGH
Access to sensitive file pathssrc/mcp_relay/cli.py:398 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system fileslines = ["Server (.env)", *issues]Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_relay/cli.py:105 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesprint(f"Server\n[ERROR] .env is invalid ({error})\nresult=invalid")Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_relay/json_bounds.py:54 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files# .env was exported, silently dead — Windows bench 2026-09-09). ConsumersFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_relay/config.py:37 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files#: Credentials are read directly from the .env by their own loaders; theyFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_relay/mcp_hub.py:8 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filescredential material lives in the alias private ``.env`` and is read at spawnFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_relay/diagnostics.py:168 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesRead on every emission so a level exported from a ``.env`` file duringFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Credential pass-through configurationsrc/mcp_relay/config.py:1906 · Credential pass-through configuration — agent relays sensitive credentials"""Mask relay tokens and credential-like keys in config show/get output.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST02
MEDIUM
npx invocation of non-well-known package.github/workflows/ci.yml:179 · npx invocation of non-well-known package — may execute untrusted code# No skips: the fs bench fails the job if node/npx or the pinnedFix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
Access to sensitive file pathssrc/mcp_relay/diagnostics.py:11 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesThe value is read on every emission so a level exported from a ``.env`` fileFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_relay/config.py:47 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files#: the YAML key, the private ``.env`` file, and the client-side catalog key,Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_relay/client.py:981 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files"--client-token is unsafe; use RELAY_CLIENT_TOKEN, .env, "Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Destructive file system command detectedDockerfile:20 · Destructive file system command detected&& rm -rf /var/lib/apt/lists/* \Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
HIGH
Access to sensitive file pathssrc/mcp_relay/config.py:521 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesraise ConfigError(".env file is unavailable") from excFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_relay/config.py:525 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesraise ConfigError(".env file is not a private regular file")Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathssrc/mcp_relay/config.py:35 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesDOTENV_FILENAME = ".env"Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
npx invocation of non-well-known packagetests/test_e2e_bench.py:10 · npx invocation of non-well-known package — may execute untrusted code(pinned) spawned via node from a pre-warmed npx cache:Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
Python subprocess execution detectedtests/test_e2e_bench.py:193 · Python subprocess execution detectedwarm = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Access to sensitive file pathstests/test_dotenv_tolerant.py:7 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesThe relay NEVER writes the .env: no key generation at init, no CLIFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_dotenv_tolerant.py:28 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files# The relay never writes the .env; tests play the operator role.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Python subprocess execution detectedtests/test_e2e_bench.py:132 · Python subprocess execution detectedreturn subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Access to sensitive file pathsdocker-compose.yml:4 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files# network. Keep credentials in the ignored .env file, never in this file.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Python subprocess execution detectedtests/test_cli_runtime.py:20 · Python subprocess execution detectedhelp_result = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Access to sensitive file pathstests/test_cli_config.py:110 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files# An explicit process variable wins over the .env fallback.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_config_topology.py:87 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files(tmp_path / ".env").chmod(0o600)Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Python subprocess execution detectedtests/test_cli_runtime.py:209 · Python subprocess execution detectedhelp_result = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_cli_runtime.py:47 · Python subprocess execution detectedequal_port_result = 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/install.sh:60 · Remote installer piped to shellcurl -fsSL https://astral.sh/uv/install.sh | shFix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST07
MEDIUM
Process kill commandsrc/mcp_relay/providers/base.py:306 · Process kill command — agent can terminate processes# it actually finishes because Python cannot force-kill an in-process task.Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Python subprocess execution detectedtests/processes.py:79 · 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
Access to sensitive file pathstests/conftest.py:53 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files# Direct pop, NOT monkeypatch.delenv: the loader exports .env entriesFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_client.py:40 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filestoken_file = tmp_path / ".env"Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_dotenv_tolerant.py:29 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesdotenv = config_path.parent / ".env"Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_e2e_bench.py:109 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesdotenv = relay_dir / ".env"Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_cli_config.py:48 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesos.symlink(outside / ".env", config_dir / ".env")Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_config_topology.py:86 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files…p_path / "config.yaml" path.write_text("not: [valid YAML") (tmp_path / ".env").write_text('RELAY_CLIENT_TOKEN=client-test-synthetic-credential-0000000000000…Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_e2e_bench.py:232 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesalias_env = home / ".mcp-relay" / "mcp" / f"{ALIAS}.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 detectedtests/test_e2e_bench.py:264 · Python subprocess execution detectedclient_proc = subprocess.Popen(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_e2e_bench.py:255 · Python subprocess execution detectedserver_proc = subprocess.Popen(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Access to sensitive file pathstests/test_cli_config.py:15 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesdotenv = config_path.parent / ".env"Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_dotenv_tolerant.py:1 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files"""The .env file is a flat operator override surface (python-dotenv based).Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_dotenv_tolerant.py:58 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files# An explicit process variable wins over the .env fallback.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Credential pass-through configurationtests/test_dotenv_tolerant.py:3 · Credential pass-through configuration — agent relays sensitive credentialsAny entry except the relay credentials becomes a process environmentFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST02
MEDIUM
Access to sensitive file pathstests/test_cli_config.py:56 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesassert not (outside / ".env").exists()Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_provider_tools.py:579 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files"resource": {"uri": "file:///etc/passwd", "text": "secret"},Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
HTTP URL with a raw public IP addresstests/test_server.py:570 · HTTP URL with a raw public IP address — a hard-coded destination that domain-based monitoring cannot namepytest.param("http://203.0.113.17:9999", id="arbitrary-ip"),Fix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.
AST07
MEDIUM
Access to sensitive file pathstests/test_mcp_hub.py:291 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files# Same relay home parent that holds the per-alias .env filesFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_packaging.py:128 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filestext = (ROOT / ".env.example").read_text()Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_size_overrides.py:7 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesno package-import hook (the removed import-time application made .envFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_onboarding.py:253 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files# Environment wins over the .env value just written.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
npx invocation of non-well-known packagetests/test_e2e_bench.py:15 · npx invocation of non-well-known package — may execute untrusted codeThe bench never skips: a missing node/npx or a failed cache warm-up is aFix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
Access to sensitive file pathstests/test_size_overrides.py:114 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesdotenv = config_path.parent / ".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 detectedtests/test_mcp_transports.py:295 · 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
Access to sensitive file pathstests/test_protocol.py:373 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files("/etc/passwd", "filesystem path"),Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
URL with embedded credentialstests/test_provider_tools.py:590 · URL with embedded credentials — may be phishing or credential leaking"resource": {"uri": "https://user:[email protected]/x"},Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST07
MEDIUM
Access to sensitive file pathstests/test_size_overrides.py:4 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesexports the .env (shell wins) into ``os.environ``, then resolves theFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_onboarding.py:563 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system fileswith pytest.raises(config.ConfigError, match=r"RELAY_CLIENT_TOKEN|\.env"):Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_packaging.py:66 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesassert {".git", ".env", ".venv", "tests/"} <= ignoredFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_size_overrides.py:27 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesdotenv = config_path.parent / ".env"Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_mcp_hub.py:233 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files# per-alias .env files (never inside the workspace); the launcher runsFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_token_contract.py:56 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files(tmp_path / ".env").write_text(f"RELAY_CLIENT_TOKEN={CLIENT}\nRELAY_MCP_TOKEN={MCP}\n")Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_size_overrides.py:115 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files# The .env must exist before init: init_config verifies the client tokenFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
npx invocation of non-well-known packagetests/test_e2e_bench.py:75 · npx invocation of non-well-known package — may execute untrusted code"""Locate the warmed package's JS entry inside the npx cache."""Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
Access to sensitive file pathstests/test_onboarding.py:35 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesreturn config_path.parent / ".env"Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
npx invocation of non-well-known packagetests/test_e2e_bench.py:189 · npx invocation of non-well-known package — may execute untrusted codenpx = shutil_which("npx")Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagetests/test_e2e_bench.py:79 · npx invocation of non-well-known package — may execute untrusted codef"{FS_PACKAGE} entry point not found in warmed npx cache {cache}"Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
URL using a raw public IP addresstests/test_server.py:570 · URL using a raw public IP address — may bypass domain-based filteringpytest.param("http://203.0.113.17:9999", id="arbitrary-ip"),Fix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.
AST07
MEDIUM
Python subprocess execution detectedtests/test_mcp_transports.py:354 · 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
URL with embedded credentialstests/test_provider_tools.py:598 · URL with embedded credentials — may be phishing or credential leakingcredential_uri = "https://user:[email protected]/resource?token=top-secret"Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST07
MEDIUM
Access to sensitive file pathstests/test_token_contract.py:57 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files(tmp_path / ".env").chmod(0o600)Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_onboarding.py:201 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files# Effective client port -> relay_url derivation (env > .env > default 8001)Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
LOW
URL to a private-network addresstests/test_server.py:663 · URL to a private-network address — a LAN or development target"http://192.168.1.41:8000",Fix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.
AST07
MEDIUM
Access to sensitive file pathstests/test_token_contract.py:89 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesassert (tmp_path / ".env").exists() == (source == "dotenv")Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_token_contract.py:82 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesdotenv = tmp_path / ".env"Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_token_contract.py:62 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesdotenv = tmp_path / ".env"Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05

Cost to the agent

Instructions loaded
≈1,323 tok
2 files · 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 mcp-relay@0.1.1 as of 6d ago. This is the package itself, not its dependencies.

What would make this Verified

12 points 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 kxlion: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
  3. Access to sensitive file paths≈ +4 on the totalStop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
  4. Credential pass-through configuration≈ +4 on the totalStop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
  5. npx invocation of non-well-known package≈ +2 on the totalPin versions and sources; vendor anything fetched at install time.
  6. Destructive file system command detected≈ +2 on the totalBuild commands from fixed arguments; do not interpolate untrusted strings into a shell.
Publish a new version to PyPI, then queue it here. Not your skill? Claim the handle to get verdict changes by email.Claim kxlionPropose a patch to the maintainer