Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Webmcp React

React hooks for exposing typed tools on document.modelContext, aligned with the current WebMCP specification.

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 45d1091f5a77.

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 60 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

    Pass

    No shell or command execution found, and no extra permission was declared.

  • Install and update

    Concern

    runs a script at install time.

    INSTALL_LIFECYCLE_HOOK

    package.json, line 60

    prepare

  • Network

    Concern

    can reach a host that is not written as a fixed address.

    NETWORK_NO_FIXED_HOST

    extension/src/background.ts, line 302

    ws = new WebSocket(`ws://127.0.0.1:${WS_PORT}`);

    skills/webmcp-setup/SKILL.md, line 96

    const res = await fetch(`/api/greet?name=${encodeURIComponent(name)}`, { signal });

    CHANGELOG.md, line 87

    user cancels the call — pass it to `fetch()` and other cancellable work. On Chrome ≤152

    Show more

    README.md, line 142

    const res = await fetch(`/api/reports/${id}`, { signal });

    extension/README.md, line 119

    4. Background aggregates tools from all tabs and syncs with **mcp-server** over WebSocket (`ws://127.0.0.1:12315`)

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_UNCONFIRMED

    src/utils/warn.ts, line 7

    if (g.process?.env?.NODE_ENV !== undefined) {

    .gitignore, line 2

    dist/

  • 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

    docs/architecture.svg, line 4

    @font-face { font-family: Excalifont; src: url(data:font/woff2;base64,d09GMgABAAAAABhIAA4AAAAAKfAAABf0AAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGhwbilYcNAZgAIFEEQgKvhCuBwtQAAE2AiQDgRwEIAWDGA

    extension/extension-architecture.svg, line 4

    @font-face { font-family: Excalifont; src: url(data:font/woff2;base64,d09GMgABAAAAABpsAA4AAAAALuAAABoVAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGhwbjEYcZAZgAIEkEQgKxXSzbQtUAAE2AiQDgSQEIAWDGA

  • 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 45d1091f5a77. runs a script at install time. can reach a host that is not written as a fixed address. 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: 45d1091f5a7782044ecd69878a7af86b4a1c4d43

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