Grades are a hygiene check, not a security guarantee.

MCP, MCP server

io.github.blightbow/parkour-mcp

parkour "an activity in which people move quickly around buildings and objects in a city while performing jumps and other skilful movements, usually trying to move between points as quickly, smoothly, and safely as possible" -- Cambridge Dictionary

Compatibility: Not stated.

Grade D

Two or more Medium findings, or a High finding. Only try it in a sandbox.

Graded by PlugVetRubric v2

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

INSTALL_REMOTE_SCRIPT NETWORK_HOST_FROM_INPUT

Why this grade

  • INSTALL_REMOTE_SCRIPT Medium

    Fetches a script from the network and runs it (a pipe to a shell, or an install hook with a URL).

    .github/workflows/docs-drift.yml, line 37 curl -sSfL https://drift.fp.dev/install.sh | sh

  • NETWORK_HOST_FROM_INPUT Medium

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

    parkour_mcp/_cli.py, line 68 help="after the call, print each recorded exchange as a curl "

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.

If you think this grade is wrong, email [email protected] with the entry link and your evidence. We aim to acknowledge within two working days and decide within seven. If we confirm an error, we aim to correct it within 24 hours of confirming it. These are aims, not guarantees.

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

    .claude/ruff-016-migration.md, line 592

    | `PLW1510` | 1 | `subprocess.run` without explicit `check=`, `test_semgrep_rules.py:40`. Decide the intended behavior rather than defaulting. |

  • Install and update

    Serious

    install fetches a script from the network.

    INSTALL_REMOTE_SCRIPT

    .github/workflows/docs-drift.yml, line 37

    curl -sSfL https://drift.fp.dev/install.sh | sh

  • Network

    Serious

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

    NETWORK_HOST_FROM_INPUT

    parkour_mcp/_cli.py, line 68

    help="after the call, print each recorded exchange as a curl "

    parkour_mcp/_cli.py, line 150

    "was served from cache, or by a transport curl cannot express "

    parkour_mcp/_pipeline.py, line 1048

    fallback to generic HTTP fetch (which hits Reddit's login wall).

    Show more

    parkour_mcp/_pipeline.py, line 1141

    fallback to generic HTTP fetch (which hits GitHub's JS-heavy SPA).

    parkour_mcp/_pipeline.py, line 1154

    # --- Blob: raw file fetch (single request, shared between cache and response) ---

    parkour_mcp/_trace.py, line 68

    # Request headers curl sets on its own; repeating them would be wrong

    parkour_mcp/_trace.py, line 349

    # curl rendering

    parkour_mcp/_trace.py, line 356

    because a curl command is what a caller pastes into a loop, and the loop

    parkour_mcp/_trace.py, line 372

    "identity differs, so a refusal seen by curl is not evidence "

    parkour_mcp/_trace.py, line 404

    lines.append(f"# for u in ...; do curl ... \"$u\"; sleep {sleep}; done")

    parkour_mcp/_trace.py, line 409

    head = "curl -sS"

    parkour_mcp/arxiv.py, line 69

    # curl on the same host sees the 429 (arXiv API Discussion, 2026-09-22, and

    parkour_mcp/common.py, line 898

    # Absolute wall-clock deadline for the entire fetch (connect + download).

    parkour_mcp/ietf.py, line 61

    # RFC Editor JSON fetch (metadata)

    .claude/TECH_DEBT.md, line 255

    - **Why deferred**: Per [yt-dlp issue #13831](https://github.com/yt-dlp/yt-dlp/issues/13831) (maintainer comment 2026-01-06 by `bashonly`), YouTube specifically rate-limits HTTP 42

  • Secrets

    Pass

    No read of a credential file or secret environment variable found.

  • 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.

Note

Hygiene check of commit 6ae5db3e9511. requests shell access. The manifest names this permission. install fetches a script from the network. accepts a host from input, with no fixed list in this file. a file was over the read cap and was not fully read.

Date and source

Date checked:

View source

github.com

Commit graded: 6ae5db3e95112e23f65337b0f96852bcb6255508

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