Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Yandex Merchants MCP

MCP-сервер для Яндекс Товаров — менять цены, скидки и видимость товаров без пересборки и повторной загрузки YML-фида

Compatibility: Not stated.

Grade D

Two or more Medium findings, or a High finding. Only try it in a sandbox.

Graded by PlugVetRubric v2

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

Rescanned at commit 4c20d26cca7f, unchanged since the check below.

INSTALL_LIFECYCLE_HOOK SECRETS_PATH_CREDENTIAL

Why this grade

  • INSTALL_LIFECYCLE_HOOK Medium

    A package install hook (preinstall, install, postinstall or prepare) runs a script.

    package.json, line 27 prepare

  • SECRETS_PATH_CREDENTIAL Medium

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

    src/auth.test.ts, line 80 assert.deepEqual(readdirSync(dirname(file)), ["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

    Pass

    No shell or command execution found, and no extra permission was declared.

  • Install and update

    Concern

    runs a script at install time.

    INSTALL_LIFECYCLE_HOOK

    package.json, line 27

    prepare

  • Network

    Concern

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

    NETWORK_NO_FIXED_HOST

    src/client.ts, line 82

    const res = await fetch(url, { ...init, signal: controller.signal });

    CLAUDE.md, line 52

    `AuthRequiredError` before the retries and before fetch (a missing setup is not

    CLAUDE.md, line 131

    4. Add a `*.test.ts` using the mock-fetch (client) / fake-client (tools) harness - no

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_CREDENTIAL SECRETS_PATH_DOTENV

    src/auth.test.ts, line 80

    assert.deepEqual(readdirSync(dirname(file)), ["credentials.json"]);

    src/auth.test.ts, line 172

    assert.ok(status.includes("credentials.json"), "but it must say where the file lives");

    src/auth.ts, line 52

    * stored - ~/.config/mcp-yandex-merchants/credentials.json, written by finish_login

    Show more

    src/config.ts, line 45

    token: process.env.YANDEX_MERCHANTS_OAUTH_TOKEN || undefined,

    src/credentials.ts, line 27

    return join(base, APP, "credentials.json");

    src/credentials.ts, line 52

    * the rename atomic) and lands on credentials.json via renameSync: a crash

    src/credentials.ts, line 62

    const tmp = join(dir, `.credentials.json.${randomBytes(6).toString("hex")}.tmp`);

    .gitignore, line 3

    *.log

    .gitignore, line 4

    .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 4c20d26cca7f. runs a script at install time. 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: 4c20d26cca7f6dd4bdc21e5de4b2c738ab25afca

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Read how this letter is chosen