Grades are a hygiene check, not a security guarantee.

MCP, MCP server

MCP E-Invoicing Core

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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.

NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV PERMISSION_SHELL_DECLARED SECRETS_ENV_READ OBFUSCATION_FILE_OVER_READ_CAP

Why this grade

  • NETWORK_NO_FIXED_HOST Low

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

    src/mcp_einvoicing_core/download_rules.py, line 106 response = httpx.get(

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    src/mcp_einvoicing_core/http_client.py, line 322 For env-var / .env loading, use OAuthConfig (which extends this class).

  • PERMISSION_SHELL_DECLARED Note

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

    src/mcp_einvoicing_core/audit.py, line 1062 completed = subprocess.run(

  • SECRETS_ENV_READ Note

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

    src/mcp_einvoicing_core/http_client.py, line 467 os.environ.get("EINVOICING_TOKEN_IDLE_TIMEOUT", "1800")

  • OBFUSCATION_FILE_OVER_READ_CAP Note

    A file was over the read cap and was not fully read.

    docs/package-lock.json, line 1 {

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

    src/mcp_einvoicing_core/audit.py, line 1062

    completed = subprocess.run(

  • 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/mcp_einvoicing_core/download_rules.py, line 106

    response = httpx.get(

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    src/mcp_einvoicing_core/http_client.py, line 320

    OAuthValues directly so callers are not forced to bind to .env.

    src/mcp_einvoicing_core/http_client.py, line 322

    For env-var / .env loading, use OAuthConfig (which extends this class).

    src/mcp_einvoicing_core/http_client.py, line 467

    os.environ.get("EINVOICING_TOKEN_IDLE_TIMEOUT", "1800")

    Show more

    src/mcp_einvoicing_core/http_client.py, line 344

    environment variables or a .env file. Pass an OAuthValues instance instead

    src/mcp_einvoicing_core/http_client.py, line 348

    model_config = {"env_file": ".env", "env_file_encoding": "utf-8", "extra": "ignore"}

    src/mcp_einvoicing_core/http_client.py, line 444

    model_config = {"env_file": ".env", "env_file_encoding": "utf-8", "extra": "ignore"}

    src/mcp_einvoicing_core/signer_client.py, line 49

    token = os.environ.get("EINVOICING_SIGNER_TOKEN", "")

    src/mcp_einvoicing_core/signer_client.py, line 62

    os.environ.get("EINVOICING_SIGNER_SOCKET") and os.environ.get("EINVOICING_SIGNER_TOKEN")

    src/mcp_einvoicing_core/signer_service.py, line 299

    cert_password: str | None = os.environ.get("EINVOICING_CERT_PASSWORD") or None

    src/mcp_einvoicing_core/signer_service.py, line 301

    token = os.environ.get("EINVOICING_SIGNER_TOKEN") or secrets.token_hex(32)

    .gitignore, line 12

    *.env

    .gitignore, line 39

    # Environment locals (secrets)

    .gitignore, line 40

    .env

  • Agent instructions

    Pass

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

  • Obfuscation

    Note

    a file was over the read cap and was not fully read.

    OBFUSCATION_FILE_OVER_READ_CAP

    docs/package-lock.json, line 1

    {

    specs/en16931/codelists/Unit.gc, line 1

    <?xml version="1.0" encoding="UTF-8"?>

    specs/peppol/CEN-EN16931-UBL-3.0.20.sch, line 1

    <?xml version="1.0" encoding="UTF-8"?>

    Show more

    specs/peppol/codelists/Document-types-v9.7.gc, line 1

    <?xml version="1.0" encoding="UTF-8"?>

    src/mcp_einvoicing_core/resources/schematron/en16931_base/CEN-EN16931-UBL.xslt, line 1

    <?xml version="1.0" encoding="UTF-8"?><stylesheet xmlns="http://www.w3.org/1999/XSL/Transform" xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"

    tests/fixtures/ubl-2.1/common/UBL-CommonAggregateComponents-2.1.xsd, line 1

    <?xml version="1.0" encoding="UTF-8"?>

    tests/fixtures/ubl-2.1/common/UBL-CommonBasicComponents-2.1.xsd, line 1

    <?xml version="1.0" encoding="UTF-8"?>

  • Licence

    Pass

    A licence file is present (LICENSE).

  • 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 fa68a5626533. 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. a file was over the read cap and was not fully read.

Date and source

Date checked:

View source

github.com

Commit graded: fa68a56265332a7de8a7afa99bc8feeb280dd493

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