Price Drop Back

io.github.GoodTurnStudio由 GitHub 帳號 GoodTurnStudio 發布v1.4.0更新於 Oct 24, 2026

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

發布方自己的服務:drop.media

已驗證Streamable HTTP可網頁執行效率與工作流金融

概覽

AI 產生的概覽

讓助理查詢商店的降價補差與價格匹配政策,判斷差價退款申請是否可能通過,並產生行事曆提醒。

可以做什麼
提供四個唯讀工具。get_store_policy 回傳某商店的降價補差與價格匹配規則,可附上查詢某商品目前價格的連結。check_price_drop_claim 依購買價、購買日期和現價,說明申請是否可能通過、可退金額與處理步驟。get_claim_reminder 回傳行事曆檔案,在商店最後申請日建立全天事件。list_stores 列出涵蓋的商店與信用卡價格保護,可依國家篩選。
適用情境
適合在購買後商品降價、想知道商店是否退還差價時使用,也適合在購買前比較哪些商店和信用卡提供價格保護。
執行需求
遠端 streamable HTTP 端點;未宣告登入、API 金鑰、環境變數或標頭。助理需要能連線到提供方的端點。
安裝前請注意
工具宣告為唯讀且不儲存使用者資訊,但請求會傳送到提供方的遠端服務。政策答案與通過可能性僅供參考,不保證退款;依賴前請向商店確認期限與條款。

安裝

在 SourceWeft 中

  1. 開啟 儀表板中的 Price Drop Back,將其新增到工作區。
  2. 為需要使用其工具的對話啟用該服務。

Web executable,透過 Streamable HTTP。 遠端服務在工作區中設定後即可從網頁執行環境執行。

交給代理程式安裝

把這段提示詞貼上到 Claude Code、Codex、Cursor 等代理程式,或 SourceWeft 對話中。代理程式會讀取該伺服器的安裝指南,先向你展示發布者、端點和登入方式,經你同意後再把它新增到你的客戶端。金鑰不會寫進任何命令。

閱讀 https://sourceweft.com/mcp/io.github.GoodTurnStudio%2Fpricedropback/install.md,並按其中說明把這個 MCP 伺服器接入我的客戶端。修改任何設定之前,先告訴我它的發布者、端點和登入方式,等我確認。不要把 API 金鑰寫進命令或我會提交的檔案;問我金鑰應從哪裡取得。

檢視代理程式所依據的安裝指南

其他 MCP 客戶端

把它新增到你客戶端的 mcpServers 設定中。

{
  "mcpServers": {
    "price-drop-back": {
      "type": "http",
      "url": "https://goodturn-mcp.pages.dev/pricedropback/mcp"
    }
  }
}

README

goodturn-mcp

Remote MCP servers for 25 free, read-only everyday helpers by Good Turn Studio: money, health, jobs, travel, shopping, halal checks, football and scripture reading. One Cloudflare Worker turns each product's public OpenAPI spec into an MCP server, so any assistant that speaks MCP (Claude, ChatGPT, Alexa+, Cursor, VS Code and others) can use them.

  • One server per product: https://goodturn-mcp.pages.dev/<slug>/mcp
  • All products in one: https://goodturn-mcp.pages.dev/all/mcp (tool names start with the product slug)
  • Streamable HTTP, stateless JSON, MCP 2025-11-25 (and 2025-06-18, 2025-03-26), no sign-in
  • Every tool is read-only, with a title and annotations (readOnlyHint: true, destructiveHint: false, idempotentHint: true)
  • Nothing about the user is stored. Privacy: https://goodturn-mcp.pages.dev/privacy

Products

ProductSlugWhat it does
MizanmizanShariah screening of US stocks under four standards, halal alternatives, purification, zakat
Halal or NothalalornotHalal checks for food, ingredients, medicines, stocks, funds and crypto
Fare DealsfaredealsCheap flights from any city, and the cheapest days to fly
Cheapest PricecheapestpriceThe lowest current price for a product, checked live
Spin My DayspinmydayA whole day out in any city, matched to weather, mood and diet
Cancel My SubcancelmysubHow to cancel US and UK subscriptions, and what a card charge is
Lower My BilllowermybillCall scripts and low-cost plans to lower household bills
Price Drop BackpricedropbackStore price-adjustment rules, deadlines and a claim message
Find My MoneyfindmymoneyOfficial unclaimed money searches in the US and UK
Supplement ChecksupplementcheckSupplement labels and doses against official upper limits
Plate PalplatepalCalories and nutrition for foods, chain meals and barcodes
Plan My WorkoutplanmyworkoutWorkout plans and how to do any exercise
Med Bill CheckmedbillcheckUS medical bills against Medicare rates, with dispute letters
Appeal My ClaimappealmyclaimUS health insurance denials, rights, deadlines and appeal letters
Job SpotterjobspotterCurrent US and UK job listings
Sync My CyclesyncmycycleLikely cycle phase today, with food and workout ideas
Wardrobe ConnectwardrobeconnectClothes that match a description or a picture
Form GuideformguideFootball form, fixtures, results and tables
Books Like ThisbookslikethisBooks like one you enjoyed, and screen adaptations
Talmud ScrollertalmudDaily Talmud with Daf Yomi, and tractates in English
Scroll the GurbanigurbaniDaily Gurbani with English, any Ang or shabad
Gita ScrollergitaDaily Bhagavad Gita verses with English
Scroll the LoreloreGreek and Norse myth, Homer, Hesiod and the Poetic Edda
Stoic ScrollerstoicsMarcus Aurelius, Epictetus and Seneca
Bible SwipebibleDaily Bible readings and any passage

How it works

  • build.py reads each product's live openapi.json and writes products.js: one tool per GET operation, named from its operationId, with inputs from its parameters. Descriptions are tidied into plain tool descriptions.
  • worker.mjs is the MCP server: initialize, tools/list and tools/call, which calls the product's own API and returns its answer. Answers with a say field carry a ready-made summary.
  • servers.json lists every server for the official MCP Registry (as io.github.GoodTurnStudio/<slug>). The Publish to the MCP Registry workflow logs in with GitHub OIDC and runs publish.py; publish.ps1 does the same from Windows.

Build and test

npm installnpm run build          # python3 build.py, then bundle to deploy/_worker.jsnpm test               # every product through the worker, against the live APIsnpm run test:live      # every tool through the deployed servers with the MCP SDK client

Deploy deploy/ as a Cloudflare Pages project in advanced mode (_worker.js).

Licence

MIT for this code. Each product's API, data and answers belong to that product and are served under its own terms, linked from its page at https://goodturn-mcp.pages.dev/<slug>.

來源:README.md,提交 7a0f5b3

工具

4

get_store_policy

A store's price adjustment and price match policy

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.

輸入參數itemstore必填country

check_price_drop_claim

Can I get the difference back?

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)

輸入參數nowitempaidstore必填countrypurchase_datedays_since_purchase

get_claim_reminder

Calendar reminder for the last day to claim a price drop

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.

輸入參數itemstore必填membercountrypurchase_date必填

list_stores

Every store covered, plus card price protection

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.

輸入參數country

版本歷史

1
  1. v1.4.0最新Sep 29, 2026

評分

已滿足適用檢查項的 100%

該評分衡量此收錄條目的完整程度,依據註冊中心條目、端點與公開來源計算得出。它不是對伺服器本身的評價,也不表示伺服器安全或目前可用:可連通性是帶日期的檢查結果,評分也不包含安裝量或使用者評價。

  • 近 30 天內可連通必需25 分
  • 已宣告認證方式必需10 分
  • 已列出工具必需15 分
  • 描述必需15 分
  • 圖示10 分
  • 文件15 分
  • 授權條款10 分

其他 Drop 整合