Grades are a hygiene check, not a security guarantee.

MCP, MCP server

X402 Payments Mcp

X402 Payments Mcp, an MCP server listed in the PlugVet directory.

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.

INSTALL_UNPINNED NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV SECRETS_ENV_READ

Why this grade

  • INSTALL_UNPINNED Low

    Dependencies use a range or git URL with no lockfile.

    package.json, line 58 @modelcontextprotocol/sdk

  • NETWORK_NO_FIXED_HOST Low

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

    src/lib/api.js, line 18 res = await fetch(url, {

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    .gitignore, line 2 .env

  • SECRETS_ENV_READ Note

    Reads an environment variable whose name contains KEY, SECRET, TOKEN, PASSWORD or CREDENTIAL.

    src/tools/pay-and-call.js, line 73 const sessionToken = args?.session_token || process.env.PAYMENT_SESSION_TOKEN || '';

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

    dependencies are not pinned.

    INSTALL_UNPINNED

    package.json, line 58

    @modelcontextprotocol/sdk

  • Network

    Concern

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

    NETWORK_NO_FIXED_HOST

    src/lib/api.js, line 18

    res = await fetch(url, {

    src/lib/x402-buyer.js, line 54

    const res = await globalThis.fetch(input, init);

    src/lib/x402-buyer.js, line 161

    res = await fetch(url, {

    Show more

    src/tools/pay-and-call.js, line 92

    res = await fetch(`${THREE_WS_BASE}/api/pay/execute`, {

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    src/tools/pay-and-call.js, line 73

    const sessionToken = args?.session_token || process.env.PAYMENT_SESSION_TOKEN || '';

    .gitignore, line 1

    node_modules/

    .gitignore, line 2

    .env

    Show more

    .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 58c46f22ca2a. dependencies are not pinned. 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: 58c46f22ca2aea637ee8ea49fb42adf6968a6003

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