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Try asking Muse: "I'm going to Japan for 5 days and need a data plan, what eSIM should I buy?"
Source: Found in the official MCP Registry (com.oneheartesim.mcp/esim) · First listed September 24, 2026
Each bar is one check, every 15 minutes. Green means it answered. Last checked 5 h ago.
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
musedirectory.ai is not part of Meta. More about how Muse handles your information
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://mcp.oneheartesim.com/Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
ONE HEART eSIM is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
In Claude, open Settings, then Connectors.
Choose Add custom connector, give it a name, and paste the link.
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://mcp.oneheartesim.com/Response time at the last check: 4078ms. Worked in 79.6% of checks over 30 days.
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
create_esim_order建立一筆真實的一心eSIM訂單，並取得真實的付款連結（LinePay或ECPay綠界，二擇一）。 這是會實際寫入正式訂單、串真實金流的動作，不是模擬或試算。 呼叫前必須先完成： 1. 已用search_esim_plans/recommend_esim_plan/get_esim_plan_detail取得正確的productId、 spec，不要自己編造或憑記憶帶入。 2. 已把商品名稱、規格、數量、單價與總金額，跟使用者逐一覆誦確認過，並取得使用者明確 同意下單（不能因為使用者說「好」「幫我訂」等籠統回應就自行猜數量或規格）。 3. 已取得使用者的erecommend_esim_plan依旅遊天數與上網用量習慣，推薦最合適的1-3個eSIM方案，並附上購買連結， 是「幫使用者選方案」最好用的工具。 適用情境：使用者詢問出國上網卡、各國eSIM方案、即時發卡服務，並描述了 「要去OO玩幾天」「想找適合的上網方案/漫遊卡」「幫我推薦/挑選eSIM」時優先使用這個， 而不是自己呼叫search_esim_plans後用猜的。list_esim_countries列出一心eSIM目前販售方案覆蓋的所有國家/地區（英文與中文名稱對照，含各國方案數量）。 適用情境：使用者問「你們支援哪些國家」「有賣OO地區的eSIM嗎」；或你準備呼叫 search_esim_plans/recommend_esim_plan，但不確定某國家在系統裡該用什麼名稱表示時， 先呼叫這個工具確認，比用猜的準確。search_esim_plans依國家、方案類型、關鍵字搜尋一心eSIM的商品清單，一次回傳多筆結果讓使用者自己比較。 適用情境：使用者想瀏覽/比較某國家的多個方案，或已經明確講出要哪種類型 （例如指定「總量型」或「每日定量型」）。 如果使用者是描述旅遊情境（去哪個國家玩幾天、上網習慣如何）要你直接建議選哪個， 改用recommend_esim_plan讓它幫忙評分挑選，不要自己從這個工具的結果裡用猜的。get_esim_plan_detail取得單一方案的完整詳情，包含商品說明（安裝/啟用步驟等）、各規格庫存、購買連結。 適用情境：使用者對某個已知方案想進一步了解安裝方式、使用細節、或確認庫存時。 需要先從search_esim_plans或recommend_esim_plan的結果取得productId，不要自己編造。https://mcp.oneheartesim.com/Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use ONE HEART eSIM to help me. It is a free service with an MCP server at https://mcp.oneheartesim.com/. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
At the last check (November 13, 2026, 09:16 UTC) the endpoint was working, answering in 4078ms. Over the last 7 days it answered 82.1% of health checks. It is checked every 15 minutes.
It was screened on September 24, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
It exposes 5 tools, including create_esim_order, recommend_esim_plan, list_esim_countries, search_esim_plans. For example, you could ask Muse: "I'm going to Japan for 5 days and need a data plan, what eSIM should I buy?"
This listing was added from public sources (Found in the official MCP Registry (com.oneheartesim.mcp/esim)). If you build ONE HEART eSIM, claim it to correct the details and get your badge.
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