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WebMCP Demo Store

by kamatanuj · remote · no sign-in to list tools · v1.0.0 · published by GitHub user kamatanuj

WebMCP demo store: same catalog via MCP tool calls vs DOM scraping. -79% bytes, -42% tokens.

Changes · 2
CompareRegistry entry

5 tools: 2 change things and 3 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http webmcp-store https://demowithmcp.converso.work/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

5 tools

Changes things 2Claude Code: ask
  • add_to_cartAdd product to cart (qty default 1).No findings

    Why it is in this group

    • The name "add_to_cart" says "add": a word for a change.
    Description, as the server wrote it
    Add product to cart (qty default 1).
  • checkoutPlace order for current cart.No findings

    Why it is in this group

    • The name "checkout" says "checkout": a word for a change.
    Description, as the server wrote it
    Place order for current cart. Returns order id.
Only reads 3Claude Code: allow
  • get_cartCurrent cart contents and total.No findings

    Why it is in this group

    • The name "get_cart" says "get": a word for reading.
    Description, as the server wrote it
    Current cart contents and total.
  • get_product_detailsFull details of one product by id.No findings

    Why it is in this group

    • The name "get_product_details" says "get": a word for reading.
    Description, as the server wrote it
    Full details of one product by id.
  • search_productsSearch product catalog.No findings

    Why it is in this group

    • The name "search_products" says "search": a word for reading.
    Description, as the server wrote it
    Search product catalog. Filter by category (mice|laptops|phones), max_price (INR), min_rating, brand substring.

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or untrusted-input or outbound.

Reads private data0
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write0
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http webmcp-store https://demowithmcp.converso.work/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__webmcp-store__search_products",
      "mcp__webmcp-store__get_product_details",
      "mcp__webmcp-store__get_cart"
    ],
    "ask": [
      "mcp__webmcp-store__add_to_cart",
      "mcp__webmcp-store__checkout"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as webmcp-store. Review it before you use it.