Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Yandex Mcp

Yandex tools for Russian/CIS markets: search, keyword research (Wordstat), webmaster analytics, Metrika, and Direct ad campaigns — 91 tools across 5 MCP servers

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 77de8d415bd4, unchanged since the check below.

PERMISSION_DELETE_FILES NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST SECRETS_PATH_DOTENV OBFUSCATION_ENCODED_BLOB SECRETS_ENV_READ

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    docs/specs/diag-mutant-tests.gate.py, line 126 shutil.rmtree(root)

  • NETWORK_NO_FIXED_HOST Low

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

    packages/yandex-direct-mcp/src/index.mjs, line 55 response = await fetch(url, options);

  • NETWORK_UNNAMED_HOST Low

    Calls a fixed host that the description does not name.

    packages/yandex-direct-mcp/src/index.mjs, line 55 response = await fetch(url, options);

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    scripts/build-mcpb.sh, line 126 **/.env

  • OBFUSCATION_ENCODED_BLOB Low

    Contains a long base64 shaped string in a file that should be readable.

    README.md, line 218 [![Add yandex-search MCP server to Cursor](https://cursor.com/deeplink/mcp-install-dark.svg)](https://cursor.com/en/install-mcp?name=yandex-search&config=eyJjb21tYW5kIjoibnB4IiwiYX

  • SECRETS_ENV_READ Note

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

    packages/yandex-direct-mcp/src/index.mjs, line 27 const token = process.env.YANDEX_DIRECT_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

    docs/specs/diag-mutant-tests.gate.py, line 126

    shutil.rmtree(root)

    docs/specs/diag-mutant-tests.gate.py, line 136

    proc = subprocess.run(

    docs/specs/diag-mutant-tests.gate.py, line 142

    shutil.rmtree(root / name, ignore_errors=True)

    Show more

    docs/specs/promo_check.py, line 50

    self.proc = subprocess.Popen(

  • 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 oauth.yandex.ru. The description does not name that host.

    NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST

    packages/yandex-direct-mcp/src/index.mjs, line 55

    response = await fetch(url, options);

    packages/yandex-direct-mcp/src/index.mjs, line 134

    response = await fetch(url, { method: 'POST', headers: baseHeaders(), body: payload });

    packages/yandex-metrika-mcp/src/auth.mjs, line 46

    const response = await fetch('https://oauth.yandex.ru/token', {

    Show more

    packages/yandex-metrika-mcp/src/index.mjs, line 39

    response = await fetch(url, options);

    packages/yandex-search-mcp/src/index.mjs, line 29

    response = await fetch(url, options);

    packages/yandex-webmaster-mcp/src/auth.mjs, line 34

    const response = await fetch('https://oauth.yandex.ru/token', {

    packages/yandex-webmaster-mcp/src/index.mjs, line 58

    response = await fetch(url, options);

    packages/yandex-webmaster-mcp/src/index.mjs, line 605

    'Retries of a failed fetch (429/5xx) are not counted, so the number of HTTP calls can be higher.',

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    packages/yandex-direct-mcp/src/index.mjs, line 27

    const token = process.env.YANDEX_DIRECT_TOKEN;

    packages/yandex-metrika-mcp/src/auth.mjs, line 7

    const clientSecret = process.env.YANDEX_CLIENT_SECRET;

    scripts/build-mcpb.sh, line 126

    **/.env

    Show more

    packages/yandex-metrika-mcp/src/index.mjs, line 23

    const token = process.env.YANDEX_METRIKA_TOKEN;

    packages/yandex-search-mcp/src/index.mjs, line 16

    const apiKey = process.env.YANDEX_SEARCH_API_KEY;

    packages/yandex-webmaster-mcp/src/auth.mjs, line 6

    const clientSecret = process.env.YANDEX_CLIENT_SECRET;

    packages/yandex-webmaster-mcp/src/index.mjs, line 42

    const token = process.env.YANDEX_WEBMASTER_TOKEN;

    packages/yandex-wordstat-mcp/src/index.mjs, line 35

    let apiKey = process.env.WORDSTAT_API_KEY;

    scripts/build-mcpb.sh, line 127

    **/.env.*

    scripts/build-mcpb.sh, line 217

    find "$stage/node_modules" -type f \( -name '*.map' -o -name '*.ts' -o -name '*.tsx' -o -name '*.mts' -o -name '*.cts' -o -name '.env' -o -name '.env.*' \) -delete

    .dockerignore, line 5

    .claude-plugin

    .dockerignore, line 6

    .env

    .gitignore, line 2

    tmp/

    .mcp.json, line 5

    "args": ["--env-file=.env", "packages/yandex-search-mcp/src/index.mjs"]

    .mcp.json, line 9

    "args": ["--env-file=.env", "packages/yandex-wordstat-mcp/src/index.mjs"]

  • Agent instructions

    Pass

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

  • Obfuscation

    Concern

    contains an encoded blob in a file that should be readable.

    OBFUSCATION_ENCODED_BLOB

    README.md, line 218

    [![Add yandex-search MCP server to Cursor](https://cursor.com/deeplink/mcp-install-dark.svg)](https://cursor.com/en/install-mcp?name=yandex-search&config=eyJjb21tYW5kIjoibnB4IiwiYX

    README.md, line 220

    [![Add yandex-wordstat MCP server to Cursor](https://cursor.com/deeplink/mcp-install-dark.svg)](https://cursor.com/en/install-mcp?name=yandex-wordstat&config=eyJjb21tYW5kIjoibnB4Ii

    README.md, line 226

    [![Add yandex-direct MCP server to Cursor](https://cursor.com/deeplink/mcp-install-dark.svg)](https://cursor.com/en/install-mcp?name=yandex-direct&config=eyJjb21tYW5kIjoibnB4IiwiYX

  • 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 77de8d415bd4. can delete files. can reach a host that is not written as a fixed address. can reach oauth.yandex.ru. The description does not name that host. reads a credential or environment file. contains an encoded blob in a file that should be readable.

Date and source

Date checked:

View source

github.com

Commit graded: 77de8d415bd4cd06368aef971fb873a7a0d5e413

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Read how this letter is chosen