Grades are a hygiene check, not a security guarantee.

MCP, MCP server

B2 Mcp

B2 Mcp, an MCP server listed in the PlugVet directory.

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.

SECRETS_PATH_CREDENTIAL OBFUSCATION_ENCODED_BLOB OBFUSCATION_MINIFIED_PAYLOAD

Why this grade

  • SECRETS_PATH_CREDENTIAL Medium

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

    scripts/check-package-budget.mjs, line 63 paths.delete(path.resolve(root, ".npmrc"));

  • OBFUSCATION_ENCODED_BLOB Medium

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

    pnpm-lock.yaml, line 1 lockfileVersion: '9.0'

  • OBFUSCATION_MINIFIED_PAYLOAD Medium

    Contains a very long line with almost no spaces in a script or style file.

    pnpm-lock.yaml, line 1 lockfileVersion: '9.0'

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

    Concern

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

    NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST

    deploy/cloudflare-worker/adapter.ts, line 27

    fetch(input: Parameters<typeof fetch>[0], init?: Parameters<typeof fetch>[1]): Promise<Response>;

    deploy/cloudflare-worker/adapter.ts, line 108

    return jwksService.fetch(request);

    deploy/cloudflare-worker/adapter.ts, line 116

    return fetch(request);

    Show more

    deploy/cloudflare-worker/worker.ts, line 4

    fetch(request: Request, env: CloudflareWorkerEnv): Promise<Response> {

    evals/harness.eval.test.ts, line 182

    ["--input-type=module", "-e", 'await fetch("https://example.com")'],

    evals/harness.ts, line 352

    const response = await fetch(url, { signal });

    scripts/check-cloudflare-worker-bundle.mjs, line 264

    const response = await fetch(`http://127.0.0.1:${port}/health`, {

    scripts/local-mcp-smoke.mjs, line 222

    return fetch(input, init);

    scripts/mcp-registry-publish.mjs, line 170

    const response = await fetch(url, { signal: controller.signal });

    scripts/packed-consumer-smoke.mjs, line 279

    const response = await fetch(`http://127.0.0.1:${port}${pathname}`, {

    scripts/performance-baseline.mjs, line 306

    const response = await fetch(`http://127.0.0.1:${port}/mcp`, {

    scripts/performance-baseline.mjs, line 641

    http.request("http://127.0.0.1", { hostname: "example.com" }),

    deploy/customer-hosted/Dockerfile, line 47

    CMD node -e "const p=process.env.PORT||3000; fetch('http://127.0.0.1:'+p+'/ready').then(async r=>{ if(!r.ok) throw new Error(await r.text()); }).catch(e=>{ console.error(e.message)

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_CREDENTIAL SECRETS_PATH_DOTENV

    deploy/cloudflare-worker/adapter.ts, line 121

    const rawMode = process.env.B2_HTTP_CREDENTIAL_MODE?.trim().toLowerCase();

    deploy/vercel/adapter.ts, line 29

    const rawMode = process.env.B2_HTTP_CREDENTIAL_MODE?.trim().toLowerCase();

    scripts/check-package-budget.mjs, line 63

    paths.delete(path.resolve(root, ".npmrc"));

    Show more

    evals/harness.eval.test.ts, line 190

    ...env,

    evals/harness.ts, line 513

    ...server?.env,

    evals/harness.ts, line 518

    LOG_LEVEL: server?.env?.LOG_LEVEL ?? "error",

    scripts/check-package-budget.mjs, line 81

    ...registrySettingsFromFile(path.join(root, ".npmrc"), ".npmrc"),

    scripts/check-package-budget.mjs, line 615

    env.npm_config_userconfig = path.join(workspace, ".npmrc");

    scripts/check-vercel-build-output.mjs, line 52

    /\bprocess\.env(?:\.([A-Z][A-Z0-9_]{2,})|\[\s*["'`]([^"'`]+)["'`]\s*\])\s*=\s*["'`][A-Za-z0-9._~+/=-]{16,}["'`]/gi,

    scripts/check-vercel-build-output.mjs, line 181

    return name === ".env" || name.startsWith(".env.") || name.endsWith(".env");

    scripts/live-b2-evidence.mjs, line 103

    B2_INTEGRATION_REQUIRE_CREDENTIALS: process.env.B2_INTEGRATION_REQUIRE_CREDENTIALS || null,

    scripts/live-b2-evidence.mjs, line 340

    process.env.B2_INTEGRATION_REQUIRE_CREDENTIALS !== "1"

    scripts/performance-baseline.mjs, line 711

    benchmarkCredentialIsFake: process.env.B2_APPLICATION_KEY === "performance-key-secret",

    scripts/performance-baseline.mjs, line 712

    benchmarkSecretSinkIsOff: process.env.B2_SECRET_SINK === "off",

    scripts/probe-b2-500s.mjs, line 87

    const hasS3 = !!(process.env.B2_APPLICATION_KEY_ID && process.env.B2_APPLICATION_KEY);

    scripts/seed-trunc-bucket.mjs, line 19

    const keyId = process.env.B2_APPLICATION_KEY_ID;

  • Agent instructions

    Pass

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

  • Obfuscation

    Concern

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

    OBFUSCATION_ENCODED_BLOB OBFUSCATION_MINIFIED_PAYLOAD

    pnpm-lock.yaml, line 1

    lockfileVersion: '9.0'

    deploy/customer-hosted/pnpm-lock.yaml, line 1

    lockfileVersion: '9.0'

    scripts/validate-pack.mjs, line 39

    /\b(?:do\s+not|don't|never)\b[\s\S]{0,90}\b(?:pause|confirm|confirmation|approval|ask|require)\b|\b(?:without|skip|omit|bypass(?:ing)?)\s+(?:the\s+)?(?:explicit\s+)?(?:pause|confir

    Show more

    tests/unit/insights.unit.test.ts, line 1

    import {

    .github/social-preview.svg, line 4

    @font-face{font-family:'Space Grotesk';font-weight:700;src:url(data:font/woff2;base64,d09GMk9UVE8AAIc4AAwAAAAA/DAAAIbmAAEbIgAAAAAAAAAAAAAAAAAAAAAAAAAADYK6XxqCZBvZCBy0MAZgAIhyATYCJA

    .github/social-preview.svg, line 5

    @font-face{font-family:'Space Grotesk';font-weight:500;src:url(data:font/woff2;base64,d09GMk9UVE8AAIo4AAwAAAAA+6AAAInmAAEbIgAAAAAAAAAAAAAAAAAAAAAAAAAADYK4ZhqCZBvZMhy0MAZgAIhyATYCJA

    .github/social-preview.svg, line 6

    @font-face{font-family:'Space Grotesk';font-weight:400;src:url(data:font/woff2;base64,d09GMk9UVE8AAIbUAAwAAAAA9/wAAIaEAAEbIgAAAAAAAAAAAAAAAAAAAAAAAAAADYKyFxqCZBvYeBy0MAZgAIhyATYCJA

    .github/social-preview.svg, line 23

    <div class="hair"></div><img class="flame" src="data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0idXRmLTgiPz4KPCEtLSBHZW5lcmF0b3I6IEFkb2JlIElsbHVzdHJhdG9yIDI3LjIuMC

    .github/social-preview.svg, line 24

    <div class="top"><img class="logo" src="data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0idXRmLTgiPz4KPCEtLSBHZW5lcmF0b3I6IEFkb2JlIElsbHVzdHJhdG9yIDI1LjEuMCwgU1ZHIE

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

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Note

Hygiene check of commit 27fba6f37f22. can reach a host that is not written as a fixed address. can reach example.com. The description does not name that host. can reach issuer.example.com. The description does not name that host. reads a credential or environment file. contains a minified payload. contains an encoded blob in a file that should be readable.

Date and source

Date checked:

View source

github.com

Commit graded: 27fba6f37f22666c70016271c8e04e5aa6b69f30

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