Grades are a hygiene check, not a security guarantee.

MCP, MCP server

PWA Debug Layer

Browser-side debug layer that exposes live PWA state (DOM, framework state, stores, events, library popups) to AI agents via MCP — eliminating the human copy/paste loop when debugging web apps with AI.

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.

NETWORK_HOST_FROM_INPUT OBFUSCATION_ENCODED_BLOB

Why this grade

  • NETWORK_HOST_FROM_INPUT Medium

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

    examples/react-pwa/public/sw.js, line 50 fetch(req).then((res) => {

  • OBFUSCATION_ENCODED_BLOB Medium

    Contains a long base64 shaped string in a file that should be readable.

    packages/host/extension/page-world.js, line 1 var PwaDebugPageWorld = (function (exports) {

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

    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

    Serious

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

    NETWORK_HOST_FROM_INPUT

    examples/react-pwa/public/sw.js, line 50

    fetch(req).then((res) => {

    packages/extension/src/page_bridge/page_dispatch.ts, line 1299

    const res = await fetch(input.scriptUrl);

    packages/extension/src/page_bridge/page_dispatch.ts, line 1520

    const res = await fetch(url);

    Show more

    packages/extension/src/sourcemap/cache.ts, line 34

    ((url: string): Promise<Response> => globalThis.fetch(url));

    packages/host/src/browser_launch/node_deps.ts, line 80

    const res = await fetch(`http://127.0.0.1:${port}/json/version`, {

    packages/host/src/browser_launch/node_deps.ts, line 322

    const res = await fetch(`http://127.0.0.1:${port}/json/list`, {

    packages/host/src/browser_launch/node_deps.ts, line 339

    * on error/timeout. Uses Node's global WebSocket (Node >= 22).

    packages/host/src/browser_launch/node_deps.ts, line 351

    const ws = new WebSocket(wsUrl);

    packages/host/src/browser_launch/node_deps.ts, line 483

    const res = await fetch(`http://127.0.0.1:${port}/json/version`, {

    packages/host/src/browser_launch/node_deps.ts, line 503

    * Uses Node's global WebSocket (Node >= 22).

    packages/host/src/browser_launch/node_deps.ts, line 515

    const ws = new WebSocket(wsUrl);

    packages/host/src/browser_launch/node_deps.ts, line 747

    const res = await fetch(`http://127.0.0.1:${port}/json/list`, {

    examples/popup-pwa/index.html, line 125

    fetch('https://invalid.example.invalid/connect').catch(() => {});

    packages/host/extension/page-world.js, line 4066

    ((url) => globalThis.fetch(url));

    packages/host/extension/page-world.js, line 9723

    const res = await fetch(input.scriptUrl);

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    .gitignore, line 35

    .keys/

    .gitignore, line 36

    .env

    .gitignore, line 37

    .env.local

  • Agent instructions

    Pass

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

  • Obfuscation

    Concern

    contains an encoded blob in a file that should be readable.

    OBFUSCATION_ENCODED_BLOB

    packages/host/extension/page-world.js, line 1

    var PwaDebugPageWorld = (function (exports) {

    packages/host/src/mcp/tools/store_get_state.ts, line 1

    import { z } from 'zod';

    packages/extension/manifest.json, line 5

    "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqORD1iZOB89zzCoA/bffPsUqxFXaeDCtN7U898HfmCvswf8UmSUTnUNkqtP8xNRY5Hl4MairGQHlMg295rRl+Z53XjjfFBGsoYT/l3DfrDcZPF2/hCRecxovaQSjF2O+

    Show more

    packages/host/extension/manifest.json, line 5

    "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqORD1iZOB89zzCoA/bffPsUqxFXaeDCtN7U898HfmCvswf8UmSUTnUNkqtP8xNRY5Hl4MairGQHlMg295rRl+Z53XjjfFBGsoYT/l3DfrDcZPF2/hCRecxovaQSjF2O+

    packages/host/extension/page-world.js, line 7364

    var WorkerFactory = createBase64WorkerFactory('Lyogcm9sbHVwLXBsdWdpbi13ZWItd29ya2VyLWxvYWRlciAqLwooZnVuY3Rpb24gKCkgewogICAgJ3VzZSBzdHJpY3QnOwoKICAgIC8qISAqKioqKioqKioqKioqKioqKioqK

  • 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 dd5f4e6a6ef9. accepts a host from input, with no fixed list in this file. reads a credential or environment file. contains an encoded blob in a file that should be readable.

Date and source

Date checked:

View source

github.com

Commit graded: dd5f4e6a6ef9d8a49c8b787036f6e22a91878989

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