SuperCheap

by hardtab · remote · no sign-in to list tools · v0.1.0 · published by GitHub user hardtab

Search products, manage a customer cart, and request current checkout quotes.

Changes · 4

Compare Registry entry

7 tools: 4 change things and 3 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone0Claude Code: ask
Changes things4Claude Code: ask: see these tools
Only reads3Claude Code: allow: see these tools

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

claude mcp add --transport http supercheap-shopping https://supercheap.market/mcp

Findings

Matches of fixed checks, with the text they matched.

3 warn

Warncatalog_search_products
The server marks "catalog_search_products" as not read-only (readOnlyHint: false), and its words say it reads.
Matched text
annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "catalog_search_products" says "search": a word for reading.
What this check looks for
Warncatalog_get_product
The server marks "catalog_get_product" as not read-only (readOnlyHint: false), and its words say it reads.
Matched text
annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "catalog_get_product" says "get": a word for reading.
What this check looks for
Warncatalog_get_similar_products
The server marks "catalog_get_similar_products" as not read-only (readOnlyHint: false), and its words say it reads.
Matched text
annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "catalog_get_similar_products" says "get": a word for reading.
What this check looks for

Tools

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

7 tools

Changes things 4Creates or changes something that can be changed back.Claude Code: ask

catalog_get_productGet product details, offer, attributes, variants, media, and a SuperCheap deep link.Reads text others write1 finding
Why it is in this group
- The name "catalog_get_product" says "get": a word for reading.
- The server marks it as not read-only (readOnlyHint: false).
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
  The server marks "catalog_get_product" as not read-only (readOnlyHint: false), and its words say it reads.
  Matched text
  annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "catalog_get_product" says "get": a word for reading.
  What this check looks for
Description, as the server wrote it
Get product details, offer, attributes, variants, media, and a SuperCheap deep link. If the item is a supplier preview, this may request background supplier-detail hydration and returns its current status; retry while pending until full product details are available before choosing a configuration or adding it to a cart.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: false
catalog_get_similar_productsFind similar products with stable continuation across catalog and supplier sources.Reads text others write1 finding
Why it is in this group
- The name "catalog_get_similar_products" says "get": a word for reading.
- The server marks it as not read-only (readOnlyHint: false).
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
  The server marks "catalog_get_similar_products" as not read-only (readOnlyHint: false), and its words say it reads.
  Matched text
  annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "catalog_get_similar_products" says "get": a word for reading.
  What this check looks for
Description, as the server wrote it
Find similar products with stable continuation across catalog and supplier sources. Use nextCursor with the same item and market for subsequent pages. A short page is not exhaustion when continuation is present. If status is pending or supplierExpansion is queued, running, or throttled, retry at retryAfter or supplierRetryAt. Supplier previews must be hydrated with catalog_get_product before choosing a configuration or adding to cart. Present only buyer-market offer prices, never supplier costs.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: false
catalog_report_product_impressionsRecord only products that were actually presented to the shopper.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
Record only products that were actually presented to the shopper. Searching alone does not mark products as viewed. This idempotent impression signal is used to demote or exclude products in later searches.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- readOnlyHint: false
catalog_search_productsSearch canonical products with category, attribute, price, provider, vendor, sorting, and bounded pagination filters.Reads text others write1 finding
Why it is in this group
- The name "catalog_search_products" says "search": a word for reading.
- The server marks it as not read-only (readOnlyHint: false).
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
  The server marks "catalog_search_products" as not read-only (readOnlyHint: false), and its words say it reads.
  Matched text
  annotations: {"readOnlyHint":false,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "catalog_search_products" says "search": a word for reading.
  What this check looks for
Description, as the server wrote it
Search canonical products with category, attribute, price, provider, vendor, sorting, and bounded pagination filters. Attribute pairs are forwarded to supplier discovery as provider Pid/Vid filters when expansion is needed, so keep the exact attributeId/valueId returned by facets. When the shopper requests N products, set limit=N (1–48); leave it unset to use the default of 12 when no count is specified. Set compact=true when limit exceeds 24; compact changes card payload size, not card selection. The product-card UI displays every returned item and supplier preview, up to 24 cards per result. Do not fetch a larger page and then select fewer only in prose: those returned cards still appear in the UI. If the shopper wants only the existing catalog or says not to search suppliers, set expandSuppliers=false so previews are not added. When product-card UI is attached, do not claim product photos are unavailable solely because the text response lacks inline images; refer to the rendered cards. Set freshOnly=true to exclude products already opened or explicitly exposed to this shopper. Use nextCursor for stable exploration pages, or nextOffset when nextCursor is unavailable; keep using the same query and filters. If status is pending, wait until retryAfter and resume with nextCursor as cursor, or nextOffset as offset when no cursor is returned; never restart a pending search from the first page. Supplier discovery automatically runs in the background for missing, weak, or exhausted results unless expandSuppliers=false. A broad result withholds unconfirmed canonical cards and describes only the current page. Continue with nextCursor when present, otherwise nextOffset; zero supplier previews on a page does not mean the search is exhausted. If supplierExpansion is queued, running, or throttled, wait until supplierRetryAt and repeat the same search. Set waitForSupplierResults=true to have the server poll a queued supplier expansion for up to maxWaitMs before returning.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
- readOnlyHint: false

Only reads 3Looks things up and changes nothing.Claude Code: allow

category_get_treeReturn a bounded category subtree.No findings
Why it is in this group
- The name "category_get_tree" says "get": a word for reading.
Description, as the server wrote it
Return a bounded category subtree. Use rootCategoryId and maxDepth to avoid loading the entire taxonomy.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- readOnlyHint: true
category_searchFind canonical SuperCheap categories using lexical and semantic matching.No findings
Why it is in this group
- The name "category_search" says "search": a word for reading.
Description, as the server wrote it
Find canonical SuperCheap categories using lexical and semantic matching.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- readOnlyHint: true
market_listFind supported SuperCheap country, language, currency, and checkout availability combinations.No findings
Why it is in this group
- The name "market_list" says "list": a word for reading.
Description, as the server wrote it
Find supported SuperCheap country, language, currency, and checkout availability combinations.
Annotations the server declares
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
- readOnlyHint: true

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 outbound.

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write3: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; catalog_get_product
catalog_get_similar_products
catalog_search_products
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.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Looked at Oct 22, 2026, 15:00 UTC, unchanged since Oct 22, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable: yes
HTTP status of an anonymous initialize: 200
tools/list served without credentials: yes
Tools that change things, listed without credentials: 4
Protocol version: 2025-06-18
WWW-Authenticate on 401: not observed
resource_metadata in WWW-Authenticate: none
RFC 9728 protected resource metadata: https://supercheap.market/.well-known/oauth-protected-resource/mcp
Authorization servers: https://supercheap.market
Legacy HTTP+SSE transport: no
Dynamic client registration: yes
Client ID metadata documents: no

WarnThe whole server
The endpoint served tools/list without credentials, and the list has 4 tools that change things (4 write). Whether a call also works without credentials was not tested: tools are never called.
Matched text
https://supercheap.market/mcp: tools/list returned 7 tools to an anonymous client, including catalog_search_products (write), catalog_report_product_impressions (write), catalog_get_product (write), catalog_get_similar_products (write)
What this check looks for

Install

Pinned to version 0.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http supercheap-shopping https://supercheap.market/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__supercheap-shopping__market_list",
      "mcp__supercheap-shopping__category_search",
      "mcp__supercheap-shopping__category_get_tree"
    ],
    "ask": [
      "mcp__supercheap-shopping__catalog_search_products",
      "mcp__supercheap-shopping__catalog_report_product_impressions",
      "mcp__supercheap-shopping__catalog_get_product",
      "mcp__supercheap-shopping__catalog_get_similar_products"
    ],
    "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 supercheap-shopping. Review it before you use it.

Capability tags behind 3 rules

mcp__supercheap-shopping__catalog_search_products untrusted-input
mcp__supercheap-shopping__catalog_get_product untrusted-input
mcp__supercheap-shopping__catalog_get_similar_products untrusted-input

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.github.hardtab/supercheap-shopping/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Anlyon alternative

4 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →

Compare with other servers for the same product.

Source: MCP Registry. Synced Oct 21, 2026, 18:35 UTC.

For agents: Markdown · JSON · report this listing