Grades are a hygiene check, not a security guarantee.

MCP, MCP server

zipnative MCP ZIP creation, inspection, secure extraction & verification

MCP server for ZIP archives — deterministic creation, inspection and listing without extracting, random-access entry reads, secure-by-default extraction, one-call verification, forward scanning of truncated streams, incremental modification without recompression, CRC-32 and

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 5af5abb43e79.

PERMISSION_DELETE_FILES NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST SECRETS_PATH_DOTENV

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    src/sandbox.ts, line 375 await fs.unlink(resolved);

  • NETWORK_NO_FIXED_HOST Low

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

    scripts/verify-docs.ts, line 1505 const res = await fetch(`https://registry.npmjs.org/${name}/latest`);

  • NETWORK_UNNAMED_HOST Low

    Calls a fixed host that the description does not name.

    scripts/verify-docs.ts, line 1505 const res = await fetch(`https://registry.npmjs.org/${name}/latest`);

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    src/server.ts, line 371 { title: 'Remove a secret for real (compact)', input: { zipBase64: SAMPLE_ZIP_PLACEHOLDER, operations: [{ op: 'remove', name: '.env' }], mode: 'compact' } },

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

    src/sandbox.ts, line 375

    await fs.unlink(resolved);

  • 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. can reach registry.npmjs.org. The description does not name that host.

    NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST

    scripts/verify-docs.ts, line 1505

    const res = await fetch(`https://registry.npmjs.org/${name}/latest`);

    src/cli.ts, line 115

    await sendWebResponse(res, await handler.fetch(request));

    SECURITY.md, line 77

    The server makes **no outbound network call, ever**. There is no network code path: no `fetch`, no socket other than the opt-in loopback listener that *receives* MCP requests. No t

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    src/server.ts, line 371

    { title: 'Remove a secret for real (compact)', input: { zipBase64: SAMPLE_ZIP_PLACEHOLDER, operations: [{ op: 'remove', name: '.env' }], mode: 'compact' } },

    .gitignore, line 6

    .env

    README.md, line 452

    { "zipBase64": "<base64 ZIP>", "operations": [{ "op": "remove", "name": ".env" }, { "op": "rename", "from": "config.json", "to": "config/app.json" }], "mode": "compact", "canonical

    Show more

    docs/AI_GUIDE.md, line 173

    2. Later, or before shipping: `modify_zip { …, operations: [{ op: 'remove', name: '.env' }], mode: 'compact' }` — the compacting rewrite (add `canonical: {}` for the canonical form

    docs/guides/INCREMENTAL.md, line 209

    modify_zip { zipPath: 'build/app-v2.zip', operations: [{ op: 'remove', name: '.env' }], mode: 'compact', outputMode: 'file', outputPath: 'build/app-final.zip' }

  • 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 5af5abb43e79. can delete files. can reach a host that is not written as a fixed address. can reach registry.npmjs.org. The description does not name that host. reads a credential or environment file.

Date and source

Date checked:

View source

github.com

Commit graded: 5af5abb43e79f70fc7669f38d25169c9e47c2200

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