Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Substack Ops

Substack Ops, an MCP server listed in the PlugVet directory.

Compatibility: Not stated.

Grade B

Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.

Graded by PlugVetRubric v2

Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.

Rescanned at commit 3631e6ed0cc3, unchanged since the check below.

NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV PERMISSION_SHELL_DECLARED

Why this grade

  • NETWORK_NO_FIXED_HOST Low

    Makes a network call whose host is not written as a fixed address.

    src/substack_ops/cli.py, line 204 curl = " ".join(lines)

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    src/substack_ops/auth.py, line 67 1. process env (.env loaded automatically)

  • PERMISSION_SHELL_DECLARED Note

    Runs shell commands, and the manifest or description says so.

    src/substack_ops/llm_subprocess.py, line 102 result = subprocess.run(

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

    src/substack_ops/llm_subprocess.py, line 102

    result = subprocess.run(

    src/substack_ops/llm_subprocess.py, line 111

    result = subprocess.run(

    src/substack_ops/mcp/install.py, line 180

    proc = subprocess.run(cmd, capture_output=True, text=True, check=False)

  • Install and update

    Pass

    No install-time script found, and dependencies are pinned or absent.

  • Network

    Concern

    can reach a host that is not written as a fixed address.

    NETWORK_NO_FIXED_HOST

    src/substack_ops/cli.py, line 204

    curl = " ".join(lines)

    src/substack_ops/client.py, line 135

    r = self.http.get(url)

    src/substack_ops/client.py, line 169

    r = self.http.get(url)

    Show more

    src/substack_ops/client.py, line 205

    r = self.http.get(url)

    src/substack_ops/client.py, line 317

    r = self.http.get(url)

    src/substack_ops/client.py, line 327

    r = self.http.get(url)

    src/substack_ops/client.py, line 352

    r = self.http.get(url, params=params)

    src/substack_ops/client.py, line 514

    r = self.http.get(f"{SUBSTACK}/api/v1/subscriptions?tvOnly=false")

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    src/substack_ops/auth.py, line 67

    1. process env (.env loaded automatically)

    src/substack_ops/cli.py, line 288

    env_path = Path(".env")

    .dockerignore, line 15

    .DS_Store

    Show more

    .dockerignore, line 16

    .env

    .gitignore, line 24

    # Local secrets / runtime

    .gitignore, line 25

    .env

    CONTRIBUTING.md, line 18

    cp .env.example .env # fill in SUBSTACK_SESSION

    README.md, line 105

    with env or `.env`. Or use one of the auth flows in `auth login` / `auth setup`.

  • Agent instructions

    Pass

    No instruction to ignore earlier instructions or to hide a step.

  • Obfuscation

    Pass

    No encoded or minified payload found.

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

Get the full report on this tool, £49

Note

Hygiene check of commit 3631e6ed0cc3. 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.

Date and source

Date checked:

View source

github.com

Commit graded: 3631e6ed0cc36bf5d084abc8ffdd44ae5d093d9f

This link goes to the original host. PlugVet does not host or check what you download from there, and installing it is your own decision and risk.

Read how this letter is chosen