Grades are a hygiene check, not a security guarantee.

MCP, MCP server

com.twelvedata/mcp

Connect Claude, ChatGPT, and other AI assistants to the Twelve Data financial API — real-time and historical prices, 60+ technical indicators, fundamentals, earnings, dividends, ETFs, company news, market movers, and more.

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 d139a77ea0f7, unchanged since the check below.

NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV PERMISSION_SHELL_DECLARED SECRETS_ENV_READ

Why this grade

  • NETWORK_NO_FIXED_HOST Low

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

    src/client.py, line 90 resp = await http.get(f"{API_BASE}/{endpoint}", headers=headers, params=clean)

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    AGENTS.md, line 17 make configure CLIENT_ID=x CLIENT_SECRET=y # write .env from .env.example (overwrites it)

  • PERMISSION_SHELL_DECLARED Note

    Runs shell commands, and the manifest or description says so.

    Dockerfile, line 10 RUN python -c "import tomllib, subprocess; deps = tomllib.load(open('pyproject.toml','rb'))['project']['dependencies']; subprocess.check_call(['pip','install','--no-cache-dir',*dep

  • SECRETS_ENV_READ Note

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

    src/auth.py, line 57 if os.environ.get("MCP_DATA_TWELVE_DATA_CLIENT_SECRET"):

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

    Note

    requests shell access. The manifest names this permission.

    PERMISSION_SHELL_DECLARED

    Dockerfile, line 10

    RUN python -c "import tomllib, subprocess; deps = tomllib.load(open('pyproject.toml','rb'))['project']['dependencies']; subprocess.check_call(['pip','install','--no-cache-dir',*dep

  • 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.

    NETWORK_NO_FIXED_HOST

    src/client.py, line 90

    resp = await http.get(f"{API_BASE}/{endpoint}", headers=headers, params=clean)

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    AGENTS.md, line 17

    make configure CLIENT_ID=x CLIENT_SECRET=y # write .env from .env.example (overwrites it)

    src/auth.py, line 16

    # Load .env at import time so all env vars are available before any method is called

    src/auth.py, line 57

    if os.environ.get("MCP_DATA_TWELVE_DATA_CLIENT_SECRET"):

    Show more

    src/auth.py, line 17

    load_dotenv(Path(__file__).parent.parent / ".env", override=False)

    src/auth.py, line 23

    # the environment or .env, never from a tool argument or config.json. Configurable so the

    src/auth.py, line 44

    2. .env file in the project directory ← server deployments

    src/auth.py, line 59

    if os.environ.get("TWELVE_DATA_API_KEY"):

    src/state.py, line 244

    own_key = os.environ.get("TWELVE_DATA_API_KEY", "")

    src/oauth/config.py, line 44

    EXCHANGE_CLIENT_SECRET = os.environ.get("MCP_DATA_EXCHANGE_CLIENT_SECRET", "")

    src/tools/account.py, line 85

    "Call oauth_configure first, or set them in .env and restart the server."

    src/tools/account.py, line 203

    lines += ["", "OAuth not configured - set CLIENT_ID + CLIENT_SECRET in .env or call oauth_configure."]

    .env.example, line 1

    # Twelve Data MCP Server - copy to .env and fill in values.

  • Agent instructions

    Pass

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

  • Obfuscation

    Pass

    No encoded or minified payload found.

  • Licence

    Note

    no licence file found.

    LICENCE_MISSING

    No file path was stored.

    no licence file found.

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

Get the full report on this tool, £49

Note

Hygiene check of commit d139a77ea0f7. requests shell access. The manifest names this permission. can reach a host that is not written as a fixed address. reads a credential or environment file. no licence file found.

Date and source

Date checked:

View source

github.com

Commit graded: d139a77ea0f7d40995e6979cd09c22dd142fbfe8

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Read how this letter is chosen