Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Jev Browser

Browser automation where Claude plans one outcome at a time and a fast decision model (Jev, TypeSafe System One) picks every click and keystroke, so Claude rarely has to read page snapshots.

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

Why this grade

  • NETWORK_NO_FIXED_HOST Low

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

    src/jev.mjs, line 51 res = await fetch(url, {

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    examples/read-demo.mjs, line 7 // Needs network and TYPESAFE_API_KEY (the repo .env is read automatically). Prints what the

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

    src/jev.mjs, line 51

    res = await fetch(url, {

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    examples/read-demo.mjs, line 7

    // Needs network and TYPESAFE_API_KEY (the repo .env is read automatically). Prints what the

    src/jev.mjs, line 11

    // TYPESAFE_API_KEY wins over OPENROUTER_API_KEY wherever each was found (environment or .env).

    src/jev.mjs, line 22

    // The environment beats .env for the same key; the first file listed beats the next.

    Show more

    src/jev.mjs, line 25

    // The MCP server skips the working directory's .env: as a plugin that is the user's project,

    src/jev.mjs, line 36

    if (!k) throw new Error("No API key: set TYPESAFE_API_KEY or OPENROUTER_API_KEY (as a Claude Code plugin: /plugin, then configure jev-browser) or put one in .env");

    .gitignore, line 1

    node_modules/

    .gitignore, line 2

    .env

    .gitignore, line 4

    !.env.example

  • Agent instructions

    Pass

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

  • Obfuscation

    Pass

    No encoded or minified payload found.

  • 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 74592bac3fa7. can reach a host that is not written as a fixed address. reads a credential or environment file.

Date and source

Date checked:

View source

github.com

Commit graded: 74592bac3fa78407ea1571b8233ead8540d531f3

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