Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Langchain Playground

A playground for LangChain.js, LangGraph, Slack, Model Context Protocol (MCP) and other LLM-related tools.

Compatibility: Not stated.

Grade D

Two or more Medium findings, or a High. 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 SECRETS_PATH_CREDENTIAL

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).

    package.json, line 9 postinstall

  • SECRETS_PATH_CREDENTIAL Medium

    Mentions a credential store path (~/.ssh, id_rsa, .npmrc, .aws/credentials, credentials.json, .netrc).

    src/libraries/aws/credentials.ts, line 12 * 4. Shared credentials file (~/.aws/credentials)

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

    Serious

    install fetches a script from the network.

    INSTALL_REMOTE_SCRIPT

    package.json, line 9

    postinstall

    package.json, line 8

    prepare

    Dockerfile.chunkhound, line 19

    RUN curl -LsSf https://astral.sh/uv/install.sh | sh

  • Network

    Concern

    can reach a host that is not written as a fixed address. can reach api.newrelic.com. The description does not name that host.

    NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST

    src/libraries/github/content.ts, line 29

    const response = await fetch(url, {

    src/libraries/github/repo.ts, line 9

    const response = await fetch(url, {

    src/libraries/github/repositoryManager.ts, line 187

    await git.fetch('origin', branch);

    Show more

    src/libraries/github/search.ts, line 10

    const response = await fetch(url, {

    src/libraries/newrelic/alerts.ts, line 54

    const response = await fetch('https://api.newrelic.com/graphql', {

    src/libraries/newrelic/incidents.ts, line 48

    const response = await fetch('https://api.newrelic.com/graphql', {

    src/libraries/newrelic/issues.ts, line 43

    const response = await fetch('https://api.newrelic.com/graphql', {

    src/libraries/newrelic/queries.ts, line 26

    const response = await fetch('https://api.newrelic.com/graphql', {

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_CREDENTIAL SECRETS_PATH_DOTENV

    src/libraries/aws/credentials.ts, line 12

    * 4. Shared credentials file (~/.aws/credentials)

    .dockerignore, line 5

    # local env files

    .dockerignore, line 6

    .env.local

    Show more

    .gitignore, line 71

    # dotenv environment variables file

    .gitignore, line 72

    .env.test

    AGENTS.md, line 161

    Create a `.env` file for local development (gitignored) with the following variables:

    AGENTS.md, line 163

    Refer @.env.dist for the full list of environment variables.

    AGENTS.md, line 357

    - **Environment Variables**: Use `.env` files for local development (`.env` is gitignored)

  • 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

    package-lock.json, line 1

    {

  • Licence

    Note

    no licence file found.

    LICENCE_MISSING

    No file path was stored.

    no licence file found.

  • 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 5c7f0aae176c. install fetches a script from the network. can reach a host that is not written as a fixed address. can reach api.newrelic.com. The description does not name that host. reads a credential or environment file. a file was over the read cap and was not fully read. no licence file found.

Date and source

Date checked:

View source

github.com

Commit graded: 5c7f0aae176c92adb5b384d853cca4006a857148

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