Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Metro Mcp

Plugin-based MCP server for React Native/Expo runtime debugging, inspection, and automation via Metro/CDP

Compatibility: Not stated.

Grade C

One Medium finding. Read the findings 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 09b27c7e7cc8, unchanged since the check below.

INSTALL_LIFECYCLE_HOOK

Why this grade

  • INSTALL_LIFECYCLE_HOOK Medium

    A package install hook (preinstall, install, postinstall or prepare) runs a script.

    package.json, line 40 prepare

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

    src/daemon.ts, line 258

    fs.unlinkSync(getDaemonRecordPath(key));

    src/daemon.ts, line 462

    fs.unlinkSync(lockPath);

    src/daemon.ts, line 520

    fs.unlinkSync(lockPath);

    Show more

    src/server.ts, line 898

    fs.unlinkSync(PROXY_LOCK_FILE);

    src/server.ts, line 971

    fs.unlinkSync(PROXY_LOCK_FILE);

  • Install and update

    Concern

    runs a script at install time. dependencies are not pinned.

    INSTALL_LIFECYCLE_HOOK INSTALL_UNPINNED

    package.json, line 40

    prepare

    package.json, line 66

    @babel/parser

  • Network

    Concern

    can reach a host that is not written as a fixed address. can reach registry.npmjs.org. The description does not name that host. can reach api.github.com. The description does not name that host.

    NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST

    src/daemon.ts, line 304

    const response = await fetch(healthUrl, {

    src/daemon.ts, line 625

    const response = await fetch(leaseUrl, {

    src/plugin.ts, line 211

    fetch(path: string): Promise<Response>;

    Show more

    src/server.ts, line 811

    return fetch(`http://${cfg.metro.host}:${cfg.metro.port}${path}`);

    src/server.ts, line 903

    const resp = await fetch(`http://127.0.0.1:${lockData.port}/json`, {

    src/server.ts, line 1280

    // If the initial attempt fails before creating any WebSocket (e.g. app not

    src/metro/events.ts, line 32

    this.ws = new WebSocket(url);

    src/plugins/devtools.ts, line 44

    const resp = await fetch(`http://localhost:${state.remoteDebuggingPort}/json`, {

    src/plugins/devtools.ts, line 53

    const activate = await fetch(

    src/plugins/errors.ts, line 123

    const response = await ctx.metro.fetch('/symbolicate');

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_UNCONFIRMED

    .gitignore, line 4

    *.tsbuildinfo

  • 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 09b27c7e7cc8. can delete files. runs a script at install time. dependencies are not pinned. can reach a host that is not written as a fixed address. can reach registry.npmjs.org. The description does not name that host. can reach api.github.com. The description does not name that host. reads a credential or environment file.

Date and source

Date checked:

View source

github.com

Commit graded: 09b27c7e7cc867a9711355b79bd9f83e1a7c7cdf

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