Grades are a hygiene check, not a security guarantee.

MCP, MCP server

io.github.BuyWhere/buywhere-mcp

AI agents use BuyWhere to search products, compare prices, and discover deals across Singapore and US merchants in real time.

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 eeb06674c9a2, unchanged since the check below.

PERMISSION_SHELL_UNDECLARED

Why this grade

  • PERMISSION_SHELL_UNDECLARED Medium

    Runs shell commands that the manifest or description does not mention.

    hashnode-post-4074524-building-an-ai-shopping-agent-that-actually-buys-things-11b.md, line 86 result = subprocess.run(

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

    requests shell access. No manifest field names shell or command execution.

    PERMISSION_SHELL_UNDECLARED

    hashnode-post-4074524-building-an-ai-shopping-agent-that-actually-buys-things-11b.md, line 86

    result = subprocess.run(

    hashnode-post-4454910-build-a-discord-shopping-bot-in-30-minutes-with-buywhere-mcp-45pn.md, line 43

    result = subprocess.run(

    hashnode-post-4455833-build-a-slack-deal-alert-bot-with-buywhere-mcp-4ol0.md, line 38

    result = subprocess.run(

    Show more

    hashnode-post-4508698-build-a-price-tracking-agent-that-monitors-deals-for-you-4kbo.md, line 66

    result = subprocess.run(

    hashnode-post-4508715-how-to-track-shopee-price-history-and-find-the-best-deals-9lk.md, line 59

    result = subprocess.run(

    hashnode-post-4515474-build-an-air-quality-agent-that-picks-the-right-hdb-purifier-using-mcp-5ece.md, line 60

    result = subprocess.run(

    hashnode-post-4515474-build-an-air-quality-agent-that-picks-the-right-hdb-purifier-using-mcp-5ece.md, line 113

    - For production, swap `subprocess.run(curl)` for `httpx.AsyncClient` - the JSON-RPC schema is identical.

    hashnode-post-4523223-build-an-ai-shopping-agent-that-actually-buys-things-with-langgraph-and-buywhere.md, line 72

    result = subprocess.run(

  • 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

    scripts/sync-devto-to-hashnode.mjs, line 86

    const response = await fetch(url, {

    src/index.ts, line 52

    "Get a free key: curl -X POST https://api.buywhere.ai/v1/auth/register " +

    src/index.ts, line 63

    res = await fetch(UPSTREAM, {

    Show more

    hashnode-post-3964768-build-an-ai-shopping-assistant-with-buywhere-mcp-in-10-minutes-2026-2e66.md, line 126

    const r = await fetch(

    hashnode-post-3964768-build-an-ai-shopping-assistant-with-buywhere-mcp-in-10-minutes-2026-2e66.md, line 145

    const r = await fetch(

    hashnode-post-3971809-why-ai-agents-cant-find-the-cheapest-products-and-what-to-do-about-it-a9.md, line 37

    resp = requests.post(

    hashnode-post-3971809-why-ai-agents-cant-find-the-cheapest-products-and-what-to-do-about-it-a9.md, line 44

    results = requests.get(

    hashnode-post-4082904-build-an-ai-shopping-agent-for-singapore-a-working-tutorial-2026-3nla.md, line 89

    resp = requests.post(

    hashnode-post-4153921-build-a-price-comparison-agent-with-buywhere-llamaindex-1ddf.md, line 27

    response = requests.get(

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    scripts/smoke-tools.mjs, line 29

    env: { ...process.env, BUYWHERE_API_KEY: process.env.BUYWHERE_API_KEY ?? "smoke-test-placeholder" },

    src/index.ts, line 32

    const API_KEY = process.env.BUYWHERE_API_KEY;

    hashnode-post-3939629-build-an-ai-shopping-agent-with-openai-agents-sdk-buywhere-mcp-1ci0.md, line 34

    Create a `.env` file:

  • 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.

Note

Hygiene check of commit eeb06674c9a2. requests shell access. No manifest field names shell or command execution. 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: eeb06674c9a22dcd103adecbed5a66c9473f55d7

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