MCP, MCP server
mcpscore
Lighthouse for MCP. Point mcpscore at an MCP server and get a score plus a list of what to fix, each finding cited to its source: the MCP spec, an RFC, the MCP Registry schema, or a stated best practice.
Compatibility: Not stated.
Grade B
Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
Rescanned at commit ba02e8f461d8.
NETWORK_NO_FIXED_HOST SECRETS_PATH_UNCONFIRMED PERMISSION_SHELL_DECLARED INSTALL_DOCUMENTED_INSTALLER SECRETS_ENV_READ OBFUSCATION_FILE_OVER_READ_CAP
Why this grade
- NETWORK_NO_FIXED_HOST Low
Makes a network call whose host is not written as a fixed address.
scripts/release.py, line 257
with urllib.request.urlopen( # noqa: S310 — fixed https registry URL - SECRETS_PATH_UNCONFIRMED Low
The Secrets check reports a credential or environment file, but no quoted line shows a recognisable path.
mcpscore/cli.py, line 372
token = args.token or os.environ.get("MCPSCORE_TOKEN") - PERMISSION_SHELL_DECLARED Note
Runs shell commands, and the manifest or description says so.
scripts/release.py, line 52
result = subprocess.run( - INSTALL_DOCUMENTED_INSTALLER Note
Documentation shows an installer that pipes a download into a shell.
npm/README.md, line 17
curl -LsSf https://astral.sh/uv/install.sh | sh - SECRETS_ENV_READ Note
Reads an environment variable whose name contains KEY, SECRET, TOKEN, PASSWORD or CREDENTIAL.
mcpscore/cli.py, line 372
token = args.token or os.environ.get("MCPSCORE_TOKEN") - OBFUSCATION_FILE_OVER_READ_CAP Note
A file was over the read cap and was not fully read.
uv.lock, line 1
version = 1
Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.
Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.
What was checked
Plain notes from the hygiene checks.
Permissions
Note
requests shell access. The manifest names this permission.
PERMISSION_SHELL_DECLARED
scripts/release.py, line 52
result = subprocess.run(
scripts/release.py, line 160
result = subprocess.run(
Install and update
Note
The docs document an installer that pipes a download into a shell.
INSTALL_DOCUMENTED_INSTALLER
npm/README.md, line 17
curl -LsSf https://astral.sh/uv/install.sh | sh
npm/bin/mcpscore.js, line 45
: "curl -LsSf https://astral.sh/uv/install.sh | sh";
Network
Concern
can reach a host that is not written as a fixed address.
NETWORK_NO_FIXED_HOST
scripts/release.py, line 257
with urllib.request.urlopen( # noqa: S310 — fixed https registry URL
scripts/release.py, line 290
with urllib.request.urlopen( # noqa: S310 — fixed https registry URL
Secrets
Concern
reads a credential or environment file.
SECRETS_ENV_READ SECRETS_PATH_UNCONFIRMED
mcpscore/cli.py, line 372
token = args.token or os.environ.get("MCPSCORE_TOKEN")
.gitignore, line 101
# Environments
Agent instructions
Pass
No instruction to ignore earlier instructions or to hide a step.
Obfuscation
Note
a file was over the read cap and was not fully read.
OBFUSCATION_FILE_OVER_READ_CAP
uv.lock, line 1
version = 1
Licence
Pass
A licence file is present (LICENSE).
Maintainer activity
Pass
The latest commit is within the last 365 days.
Note
Hygiene check of commit ba02e8f461d8. requests shell access. The manifest names this permission. can reach a host that is not written as a fixed address. reads a credential or environment file. a file was over the read cap and was not fully read.
Date and source
Date checked:
github.com
Commit graded: ba02e8f461d8a7c0036e8439397fd4f3d3dcc5a9
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