Grades are a hygiene check, not a security guarantee.

MCP, MCP server

canonic

canonic, an MCP server listed in the PlugVet directory.

Compatibility: Not stated.

Grade C

One Medium finding. Read the report before installing.

Graded by PlugVetRubric v2

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

NETWORK_HOST_FROM_INPUT

Why this grade

  • NETWORK_HOST_FROM_INPUT Medium

    A file takes a URL or endpoint as input and has no fixed host list.

    canonic/config.py, line 101 #: parameters a provider needs to do its fetch (``region``, ``cluster_id``,

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

    canonic/cli/commands/gc.py, line 80

    shutil.rmtree(path)

    canonic/mcp/daemon.py, line 12

    The background daemon is spawned via ``subprocess.Popen`` (fork+exec into a fresh

    canonic/mcp/daemon.py, line 210

    proc: subprocess.Popen[bytes],

    Show more

    canonic/mcp/daemon.py, line 342

    Re-launches ``python -m canonic mcp start ... --_child`` via ``subprocess.Popen``

    canonic/mcp/daemon.py, line 404

    proc = subprocess.Popen( # noqa: S603 - fixed argv, no shell, no user-controlled parts

    canonic/packs/repo.py, line 62

    subprocess.run(

    scripts/check_contract_changelog.py, line 20

    result = subprocess.run(

    scripts/check_contract_changelog.py, line 31

    result = subprocess.run(

  • Install and update

    Pass

    No install-time script found, and dependencies are pinned or absent.

  • Network

    Serious

    accepts a host from input, with no fixed list in this file.

    NETWORK_HOST_FROM_INPUT

    canonic/config.py, line 101

    #: parameters a provider needs to do its fetch (``region``, ``cluster_id``,

    canonic/credentials.py, line 386

    knows *how* to fetch (region, cluster id, db user). Ignored for static refs.

    canonic/cli/commands/knowledge.py, line 52

    # connection id nor the capability contract, just fetch() for one reference.

    Show more

    canonic/cli/commands/knowledge.py, line 137

    ref: Annotated[str, typer.Argument(help="Source reference to fetch (e.g. a URL).")],

    canonic/cli/commands/knowledge.py, line 237

    raw_docs = await builder(ref).fetch()

    canonic/connectors/evidence.py, line 110

    async def fetch(self) -> list[RawDoc]:

    canonic/connectors/evidence.py, line 192

    await self._fetch_adapter.fetch()

    canonic/connectors/evidence.py, line 203

    raw_docs = await self._fetch_adapter.fetch()

    canonic/connectors/notion.py, line 217

    async def fetch(self) -> list[RawDoc]:

    canonic/connectors/web.py, line 87

    async def fetch(self, url: str) -> str: ...

    Dockerfile, line 12

    CMD python -c "import urllib.request; urllib.request.urlopen('http://127.0.0.1:7474/livez', timeout=2)"

    scripts/posthog_pack_demo/Dockerfile, line 21

    CMD python -c "import urllib.request; urllib.request.urlopen('http://127.0.0.1:7474/livez', timeout=2)"

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    .gitignore, line 153

    # Environments

    CLAUDE.md, line 44

    - `.env` files - never read or modify

  • 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. the file cap was reached before every file was read.

    OBFUSCATION_FILE_OVER_READ_CAP OBFUSCATION_FILE_CAP_REACHED

    uv.lock, line 1

    version = 1

    examples/coffeehouse/coffeehouse.duckdb, line 1

    �-�Z�n�DUCK@v1.5.6069cc9f9b5

    examples/dutch-railway/dutch_railway.duckdb, line 1

    ��]�F�DUCK@v1.5.408e34c447b

    Show more

    examples/dutch-railway/dbt/manifest.json, line 1

    {"metadata": {"dbt_schema_version": "https://schemas.getdbt.com/dbt/manifest/v12.json", "dbt_version": "1.11.12", "generated_at": "2026-07-05T09:59:24.766685Z", "invocation_id": "0

    examples/jaffle-shop/README.md, line 1

    # Canonic Jaffle Shop demo

  • Licence

    Pass

    A licence file is present (LICENSE.md).

  • 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 f63db70e16da. can delete files. accepts a host from input, with no fixed list in this file. reads a credential or environment file. a file was over the read cap and was not fully read. the file cap was reached before every file was read.

Date and source

Date checked:

View source

github.com

Commit graded: f63db70e16daeaa396ed2f24113e34c715bf3f2f

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Read how this letter is chosen