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Comparr

by comparr.fr · remote · no sign-in to list tools · v1.1.0 · published by fr.comparr

Compare prices across French merchants, with recorded price history and verified price drops.

Changes · 1
CompareRegistry entry

4 tools: 1 change things and 3 only read.

Scanned Oct 21, 2026

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

claude mcp add --transport http comparr https://www.comparr.fr/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnsearch_products

    The server marks "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 "search_products" says "search": 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.

4 tools

Changes things 1Claude Code: ask
  • search_productsCompare the prices of a product category or a specific model across merchants (France on comparr.fr, United States on comparr.co).1 finding

    Why it is in this group

    • The name "search_products" says "search": a word for reading.
    • The server marks it as not read-only (readOnlyHint: false).

    Findings

    • Warn

      The server marks "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 "search_products" says "search": a word for reading.

      What this check looks for
    Description, as the server wrote it
    Compare the prices of a product category or a specific model across merchants (France on comparr.fr, United States on comparr.co). Returns ranked products with every offer, the exact seller, the item condition and the date each price was checked. If no comparison exists yet, one is started and the result has status 'pending' with retry_after_seconds: the full results are available about 60 seconds later for the same query.

    Annotations the server declares

    • title: Rechercher et comparer des produits
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
Only reads 3Claude Code: allow
  • get_dealsCurrent verified price drops: the SAME offer is cheaper than its own lowest recorded price over the previous 90 days, backed by several days of readings, checked within 48 h, new c…No findings

    Why it is in this group

    • The name "get_deals" says "get": a word for reading.
    Description, as the server wrote it
    Current verified price drops: the SAME offer is cheaper than its own lowest recorded price over the previous 90 days, backed by several days of readings, checked within 48 h, new condition only, Amazon offers re-verified. Each deal returns its proof (reference price, period, number of reading days). Optionally filter by words in the product name.

    Annotations the server declares

    • title: Baisses de prix vérifiées
    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
  • get_price_historyRecorded price history of one product: best price per day across all offers AND the series of each individual offer, which tells a real price drop apart from a cheaper seller appea…No findings

    Why it is in this group

    • The name "get_price_history" says "get": a word for reading.
    Description, as the server wrote it
    Recorded price history of one product: best price per day across all offers AND the series of each individual offer, which tells a real price drop apart from a cheaper seller appearing. Readings are periodic, dated snapshots (often weekly), not daily tracking.

    Annotations the server declares

    • title: Historique de prix
    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
  • get_productAll current offers for one product (id or slug from search_products or get_deals), with the date each price was checked, the exact seller, the condition, and a 'is now a good time …No findings

    Why it is in this group

    • The name "get_product" says "get": a word for reading.
    Description, as the server wrote it
    All current offers for one product (id or slug from search_products or get_deals), with the date each price was checked, the exact seller, the condition, and a 'is now a good time to buy' verdict computed from Comparr's recorded price history.

    Annotations the server declares

    • title: Fiche produit
    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false

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.

Install

Pinned to version 1.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http comparr https://www.comparr.fr/mcp

Run in a terminal.

Claude Code permissions

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

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__comparr__get_product",
      "mcp__comparr__get_price_history",
      "mcp__comparr__get_deals"
    ],
    "ask": [
      "mcp__comparr__search_products"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as comparr. Review it before you use it.