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Price Drop Back

by GoodTurnStudio · remote · no sign-in to list tools · v1.4.0 · published by GitHub user GoodTurnStudio

Did the price drop after you bought it? Store price-adjustment rules, deadlines and a claim message.

Deletes · 1Changes · 1
CompareRegistry entry

4 tools: 1 can delete or cancel things, 1 change things and 2 only read.

Scanned Oct 21, 2026

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

claude mcp add --transport http pricedropback https://goodturn-mcp.pages.dev/pricedropback/mcp

Findings

Matches of fixed checks, with the text they matched.

3 warn
  • Warnget_store_policy

    The server marks "get_store_policy" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "get_store_policy" says "get": a word for reading.

    What this check looks for
  • Warncheck_price_drop_claim

    The server marks "check_price_drop_claim" read-only (readOnlyHint: true), and its own name, description or input give the class "destructive".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "check_price_drop_claim" says "drop": a word for removing or ending something.

    What this check looks for
  • Warncheck_price_drop_claim

    The server marks "check_price_drop_claim" not destructive (destructiveHint: false), and its own name, description or input give the class "destructive".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "check_price_drop_claim" says "drop": a word for removing or ending something.

    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

Deletes or cancels 1Claude Code: deny
  • check_price_drop_claimCan I get the difference back?2 findings

    Why it is in this group

    • The name "check_price_drop_claim" says "drop": a word for removing or ending something.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    • The server marks it not destructive (destructiveHint: false), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "check_price_drop_claim" read-only (readOnlyHint: true), and its own name, description or input give the class "destructive".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "check_price_drop_claim" says "drop": a word for removing or ending something.

      What this check looks for
    • Warn

      The server marks "check_price_drop_claim" not destructive (destructiveHint: false), and its own name, description or input give the class "destructive".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "check_price_drop_claim" says "drop": a word for removing or ending something.

      What this check looks for
    Description, as the server wrote it
    Can I get the difference back? For requests like "I bought a TV at Best Buy 9 days ago for $499 and it's $449 now, can I get the difference?". Says whether a claim is likely (likely, likely_if_member, unlikely, check or no_drop), the amount, and the steps. With an item name it adds a Cheapest Price link and Amazon and eBay links to check today's price. Likely claims also get claim_message, ready to paste into the store's chat or email. policy.refund_paid_as flags stores that pay store credit (Newegg)

    Annotations the server declares

    • title: Can I get the difference back?
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
Changes things 1Claude Code: ask
  • get_store_policyA store's price adjustment and price match policy.1 finding

    Why it is in this group

    • The name "get_store_policy" says "get": a word for reading.
    • The description's first verb is "store": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "get_store_policy" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "get_store_policy" says "get": a word for reading.

      What this check looks for
    Description, as the server wrote it
    A store's price adjustment and price match policy. For requests like "does Target do price matching?", "does John Lewis refund if the price drops?", "Currys price promise", "what's Best Buy's price adjustment policy?", "will Costco refund the difference?". With an item name it adds links to check today's price.

    Annotations the server declares

    • title: A store's price adjustment and price match policy
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
Only reads 2Claude Code: allow
  • get_claim_reminderCalendar reminder for the last day to claim a price drop.No findings

    Why it is in this group

    • The name "get_claim_reminder" says "get": a word for reading.
    Description, as the server wrote it
    Calendar reminder for the last day to claim a price drop. Returns a calendar file (.ics) with an all-day event on the store's last claim day, how to claim and the policy link, with alerts 3 days before and on the day. Nothing is stored. check_price_drop_claim gives this link as add_to_calendar when purchase_date is given and a claim is likely.

    Annotations the server declares

    • title: Calendar reminder for the last day to claim a price drop
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • list_storesEvery store covered, plus card price protection.No findings

    Why it is in this group

    • The name "list_stores" says "list": a word for reading.
    Description, as the server wrote it
    Every store covered, plus card price protection. For requests like "which stores give you money back if the price drops?" or "does my credit card have price protection?". With country=GB, lists the UK policies.

    Annotations the server declares

    • title: Every store covered, plus card price protection
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: 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.

Install

Pinned to version 1.4.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http pricedropback https://goodturn-mcp.pages.dev/pricedropback/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__pricedropback__get_claim_reminder",
      "mcp__pricedropback__list_stores"
    ],
    "ask": [
      "mcp__pricedropback__get_store_policy"
    ],
    "deny": [
      "mcp__pricedropback__check_price_drop_claim"
    ]
  }
}

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 pricedropback. Review it before you use it.