Grades are a hygiene check, not a security guarantee.

MCP, MCP server

PlainQuery | MCP DB Agent

Ask your database questions in plain English. PlainQuery connects PostgreSQL databases to Claude, Cursor, or VS Code — and answers with real, structured data instead of guesses.

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 90db627edb1c, unchanged since the check below.

NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV 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.

    AGENTS.md, line 152 curl -X POST http://localhost:8000/api/v1/users/register \

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    AGENTS.md, line 30 # Run integration tests (needs API keys in .env and a seeded demo.db)

  • OBFUSCATION_FILE_OVER_READ_CAP Note

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

    uv.lock, line 1 version = 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

    Pass

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

  • 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

    AGENTS.md, line 152

    curl -X POST http://localhost:8000/api/v1/users/register \

    CLAUDE.md, line 198

    curl -X POST http://localhost:8000/api/v1/users/register \

    frontend/src/app/(protected)/layout.tsx, line 43

    await fetch(`${backendUrl}/api/v1/auth/logout`, {

    Show more

    frontend/src/app/auth/login/complete/route.ts, line 24

    const res = await fetch(

    frontend/src/app/auth/login/complete/route.ts, line 37

    const statusRes = await fetch(`${backendUrl}/api/v1/account/status`, {

    frontend/src/app/auth/signout/route.ts, line 10

    await fetch(`${backendUrl}/api/v1/auth/logout`, {

    frontend/src/app/auth/verify/complete/route.ts, line 23

    const res = await fetch(

    frontend/src/lib/api/backend.ts, line 18

    return fetch(`${BACKEND_URL}/api${path}`, {

    frontend/src/lib/api/backend.ts, line 33

    return fetch(`${BACKEND_URL}/api${path}`, {

    scripts/smoke_oauth_mcp.py, line 156

    resp = httpx.post(f"{ISSUER}/oauth/token", data=token_payload, timeout=15)

    Dockerfile, line 31

    sys.exit(0 if urllib.request.urlopen('http://127.0.0.1:8000/api/health/ready', timeout=3).status==200 else 1)"

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    AGENTS.md, line 30

    # Run integration tests (needs API keys in .env and a seeded demo.db)

    CLAUDE.md, line 30

    # Run integration tests (needs API keys in .env and a seeded demo.db)

    alembic/env.py, line 9

    # Load .env so AUTH_DATABASE_URL is available when running alembic from the CLI

    Show more

    alembic/env.py, line 13

    load_dotenv(Path(__file__).parent.parent / ".env")

    scripts/reset_auth_db.py, line 3

    Reads ``AUTH_DATABASE_URL`` from your ``.env`` (via src.config.settings) and

    scripts/smoke_mcp_deployment.py, line 40

    _DEFAULT_ENV_FILE = Path(__file__).parent.parent / ".env"

    scripts/smoke_oauth_mcp.py, line 9

    2. Make sure your .env has OAUTH_ISSUER_URL, OAUTH_AUDIENCE, OAUTH_CLIENT_ID set.

    scripts/smoke_oauth_mcp.py, line 28

    # Load settings from .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

    uv.lock, line 1

    version = 1

    frontend/pnpm-lock.yaml, line 1

    lockfileVersion: '9.0'

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

Note

Hygiene check of commit 90db627edb1c. 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: 90db627edb1c43248f596d450fd051ed33549de6

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