Grades are a hygiene check, not a security guarantee.

MCP, MCP server

osu! MCP

osu! MCP, an MCP server listed in the PlugVet directory.

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 5ffcf1bbd66c, unchanged since the check below.

SECRETS_PATH_UNCONFIRMED PERMISSION_SHELL_DECLARED SECRETS_ENV_READ OBFUSCATION_FILE_OVER_READ_CAP

Why this grade

  • SECRETS_PATH_UNCONFIRMED Low

    The Secrets check reports a credential or environment file, but no quoted line shows a recognisable path.

    src/osu_mcp/config.py, line 48 csec = os.environ.get("OSU_CLIENT_SECRET")

  • PERMISSION_SHELL_DECLARED Note

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

    docs/superpowers/plans/2026-05-22-osu-mcp.md, line 2833 def _send_jsonrpc_request(proc: subprocess.Popen, payload: dict) -> dict:

  • SECRETS_ENV_READ Note

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

    src/osu_mcp/config.py, line 48 csec = os.environ.get("OSU_CLIENT_SECRET")

  • 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

    Note

    requests shell access. The manifest names this permission.

    PERMISSION_SHELL_DECLARED

    docs/superpowers/plans/2026-05-22-osu-mcp.md, line 2833

    def _send_jsonrpc_request(proc: subprocess.Popen, payload: dict) -> dict:

    docs/superpowers/plans/2026-05-22-osu-mcp.md, line 2844

    proc = subprocess.Popen(

  • Install and update

    Pass

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

  • Network

    Pass

    No network call found.

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_UNCONFIRMED

    src/osu_mcp/config.py, line 48

    csec = os.environ.get("OSU_CLIENT_SECRET")

    .gitignore, line 13

    .ruff_cache/

    docs/superpowers/plans/2026-05-22-osu-mcp.md, line 201

    .ruff_cache/

  • 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

  • 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 5ffcf1bbd66c. requests shell access. The manifest names this permission. 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: 5ffcf1bbd66c8863f600bded89d2cbb3838d837a

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Read how this letter is chosen