Grades are a hygiene check, not a security guarantee.

MCP, MCP server

x402nano

x402nano is machine-payable Polymarket market intelligence for AI agents and MCP clients.

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.

Rescanned at commit edfdf4efcd67, unchanged since the check below.

PERMISSION_DELETE_FILES NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV SECRETS_ENV_READ

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    mcp-server/src/payment-budget.ts, line 128 await fs.unlink(lockPath).catch(error => {

  • NETWORK_NO_FIXED_HOST Low

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

    examples/delta-polling.js, line 6 const response = await fetch(new URL(path, API_ORIGIN), options);

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    .gitignore, line 7 .env

  • SECRETS_ENV_READ Note

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

    scripts/mainnet-x402-buyer.js, line 32 const privateKey = process.env.MAINNET_BUYER_PRIVATE_KEY?.trim();

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

    mcp-server/src/payment-budget.ts, line 128

    await fs.unlink(lockPath).catch(error => {

    mcp-server/src/payment-budget.ts, line 144

    if (Date.now() - stat.mtimeMs > 30_000) await fs.unlink(lockPath);

  • Install and update

    Pass

    No install-time script found, and dependencies are pinned or absent.

  • Network

    Concern

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

    NETWORK_NO_FIXED_HOST

    examples/delta-polling.js, line 6

    const response = await fetch(new URL(path, API_ORIGIN), options);

    scripts/mainnet-x402-buyer.js, line 50

    const response = await fetch(url, options);

    server/index.js, line 1478

    curl: `curl "${trendingUrl}"`

    Show more

    server/index.js, line 1481

    curl: `curl -i "${paidUrl}"`,

    server/index.js, line 1487

    curl: `curl "${paidUrl}" -H "${PAYMENT_HEADER}: <signed-x402-payment>"`,

    server/index.js, line 1491

    curl: `curl -i "${deltaUrl}"`,

    server/index.js, line 1497

    curl: `curl "${deltaUrl}" -H "${PAYMENT_HEADER}: <signed-x402-payment>"`,

    server/payment-providers.js, line 119

    const response = await fetch(`${baseUrl}${path}`, {

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    scripts/create-mainnet-buyer-wallet.js, line 6

    const envPath = path.resolve(".env.mainnet.local");

    scripts/mainnet-x402-buyer.js, line 32

    const privateKey = process.env.MAINNET_BUYER_PRIVATE_KEY?.trim();

    .gitignore, line 7

    .env

    Show more

    scripts/mainnet-x402-buyer.js, line 29

    await loadLocalEnv(".env.mainnet.local");

    server/index.js, line 17

    const FACILITATOR_SECRET = process.env.FACILITATOR_SECRET ?? "sandbox-facilitator-secret";

    server/index.js, line 31

    const ADMIN_TOKEN = process.env.LEAD_PACK_ADMIN_TOKEN?.trim() ?? "";

    server/index.js, line 422

    facilitatorApiKey: process.env.X402_FACILITATOR_API_KEY,

    server/index.js, line 423

    cdpApiKeyId: process.env.CDP_API_KEY_ID,

    server/index.js, line 424

    cdpApiKeySecret: process.env.CDP_API_KEY_SECRET

    .dockerignore, line 4

    *.log

    .gitignore, line 6

    data/production-lead-pack.runtime.json.tmp

    .gitignore, line 9

    !.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 edfdf4efcd67. can delete files. 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: edfdf4efcd6735a73a20258036b193a3690ab78e

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