Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Paper Lantern

Research intelligence for AI coding agents.

Compatibility: Not stated.

Grade C

One Medium finding. Read the findings 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 f3aa9c54d3da, unchanged since the check below.

SECRETS_PATH_CREDENTIAL

Why this grade

  • SECRETS_PATH_CREDENTIAL Medium

    Mentions a credential store path (~/.ssh, id_rsa, .npmrc, .aws/credentials, credentials.json, .netrc).

    src/auth.ts, line 10 const CREDENTIALS_FILE = path.join(CREDENTIALS_DIR, "credentials.json");

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/configure.ts, line 418

    fs.unlinkSync(rulePath);

    src/configure.ts, line 433

    fs.unlinkSync(destFile);

  • 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

    src/auth.ts, line 53

    const codeResp = await fetch(DEVICE_CODE_URL, {

    src/auth.ts, line 86

    resp = await fetch(DEVICE_TOKEN_URL, {

    src/index.ts, line 12

    const resp = await fetch("https://registry.npmjs.org/paperlantern/latest", {

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_CREDENTIAL SECRETS_PATH_DOTENV

    src/auth.ts, line 10

    const CREDENTIALS_FILE = path.join(CREDENTIALS_DIR, "credentials.json");

    src/auth.ts, line 29

    /** Load cached credentials from ~/.paperlantern/credentials.json */

    src/auth.ts, line 40

    /** Save credentials to ~/.paperlantern/credentials.json (mode 600) */

    Show more

    .gitignore, line 4

    .DS_Store

    .gitignore, line 5

    .env

  • 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 f3aa9c54d3da. 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: f3aa9c54d3da586cc8421692ad692765b29b120f

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