Grades are a hygiene check, not a security guarantee.

MCP, MCP server

io.github.Mad-Man-Dan/karbon-mcp-server

🚧 Early release — this project is brand new and we're actively making updates over the next few days.

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 6a4e0547f456, unchanged since the check below.

PERMISSION_DELETE_FILES NETWORK_NO_FIXED_HOST SECRETS_PATH_UNCONFIRMED INSTALL_DOCUMENTED_INSTALLER SECRETS_ENV_READ

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    scripts/build-mcpb.mjs, line 13 fs.rmSync(path.join(root, "dist-mcpb"), { recursive: true, force: true });

  • NETWORK_NO_FIXED_HOST Low

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

    src/karbon-client.ts, line 84 const response = await fetch(url, init);

  • SECRETS_PATH_UNCONFIRMED Low

    The Secrets check reports a credential or environment file, but no quoted line shows a recognisable path.

    src/index.ts, line 12 const bearerToken = process.env.KARBON_BEARER_TOKEN ?? "";

  • INSTALL_DOCUMENTED_INSTALLER Note

    Documentation shows an installer that pipes a download into a shell.

    README.md, line 61 curl -fsSL https://raw.githubusercontent.com/Mad-Man-Dan/karbon-mcp-server/main/scripts/install.sh | bash

  • SECRETS_ENV_READ Note

    Reads an environment variable whose name contains KEY, SECRET, TOKEN, PASSWORD or CREDENTIAL.

    src/index.ts, line 12 const bearerToken = process.env.KARBON_BEARER_TOKEN ?? "";

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

    Concern

    can delete files.

    PERMISSION_DELETE_FILES

    scripts/build-mcpb.mjs, line 13

    fs.rmSync(path.join(root, "dist-mcpb"), { recursive: true, force: true });

  • Install and update

    Note

    README documents an installer that pipes a download into a shell. The docs document an installer that pipes a download into a shell.

    INSTALL_DOCUMENTED_INSTALLER

    README.md, line 61

    curl -fsSL https://raw.githubusercontent.com/Mad-Man-Dan/karbon-mcp-server/main/scripts/install.sh | bash

    docs/client-guides.md, line 38

    curl -fsSL https://raw.githubusercontent.com/Mad-Man-Dan/karbon-mcp-server/main/scripts/install.sh | bash

    scripts/install.sh, line 4

    # curl -fsSL https://raw.githubusercontent.com/Mad-Man-Dan/karbon-mcp-server/main/scripts/install.sh | bash

  • Network

    Concern

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

    NETWORK_NO_FIXED_HOST

    src/karbon-client.ts, line 84

    const response = await fetch(url, init);

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_UNCONFIRMED

    src/index.ts, line 12

    const bearerToken = process.env.KARBON_BEARER_TOKEN ?? "";

    src/index.ts, line 13

    const accessKey = process.env.KARBON_ACCESS_KEY ?? "";

    src/index.ts, line 49

    startHttpServer(config, port, process.env.KARBON_HTTP_SECRET);

    Show more

    src/setup.ts, line 325

    const oldEnv = config[rootKey]?.karbon?.env ?? {};

    .gitignore, line 2

    dist/

  • 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.

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Note

Hygiene check of commit 6a4e0547f456. can delete files. README documents an installer that pipes a download into a shell. The docs document an installer that pipes a download into a shell. 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: 6a4e0547f456c6b9608d21c3f559633d10a86b10

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