Ec Storefront MCP Server

by jpyc-service Your server? Claim it

not responding

Ec Storefront is listed as active in the registry but did not answer our last check. It exposes 9 tools.

JPYC (JPY stablecoin) EC platform MCP: product search, x402 gasless checkout, order status.

Uptime history 51 days of history · worst day 37%

51 days agonow

69.2%

Uptime 24h

63 of 91 checks

Tools

read from the server

394 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 8

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 12 September 2026. No other catalogue keeps this.

19 Sep 2 tool descriptions were rewritten quote_checkout, submit_payment

19 Sep a tool changed the parameters it asks for quote_checkout

18 Sep a tool changed the parameters it asks for quote_checkout

12 Sep 2 tool descriptions were rewritten quote_checkout, submit_payment

12 Sep a tool appeared authorize_transfer

12 Sep a tool changed the parameters it asks for quote_checkout

Ec Storefront does not always answer

Over the last week it answered 91.1% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add ec-storefront --transport http https://ec.jpyc-service.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "ec-storefront": {
      "url": "https://ec.jpyc-service.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.ec-storefront]
url = "https://ec.jpyc-service.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "ec-storefront": {
      "url": "https://ec.jpyc-service.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "ec-storefront": {
      "url": "https://ec.jpyc-service.com/mcp"
    }
  }
}

Available tools 9

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

products

list_products_in_shop

1 つのショップの公開中の商品をすべて返す。価格（JPYC 建て）・在庫・バリエーション・配送要否・対応チェーンを含む。list_shops でショップを見つけたあと、その品揃えを見るのに使う。

search_products

JPYC EC Platform 上の公開商品を横断検索する。減農薬米・地酒・伝統工芸品など、生産者から直接 JPYC で購入できる商品が対象。text は自然言語のキーワード（例: 『丹波米』）で、商品名と説明に部分一致する。category / tag（産地・認証種別など）、価格帯（min_price / max_price、JPYC）、shop_slug で絞り込める。売上順で最大 50 件返す。

authorize

authorize_transfer

erc20-transfer 方式だけで、JPYC を送金する前に必ず呼ぶ。quote_checkout の選択した accept にある extra.payerAuthorization.message をウォレットで personal_sign し、その署名と reservation_id を渡す。サーバは EOA / ERC-1271 / ERC-6492 を検証して予約へ固定する。このツール自体は送金も approve も行わない。成功を確認してから accepted.amount ぴったりを transfer すること。eip3009 方式では呼ばない。

order

get_order_status

ウォレットアドレスの注文履歴を新しい順で返す。x402 で購入した注文は即時に order_status=3（決済完了）となり tx_hash を持つ。

product

get_product

1 つの商品の詳細を product_id で取得する。価格（JPYC 建て）・在庫・SKU・バリエーション・配送要否・対応チェーンを返す。購入の前に必ず呼んで、requires_shipping（配送先が必要か）と has_variants（オプション選択が必要か）を確認すること。

quote

quote_checkout

カートの内容で x402 チェックアウトの 1 回目を実行する。在庫を仮押さえし（有効期限は返り値 expires_at_unix_ms）、小計・割引・送料・合計（JPYC）と reservation_id、および PAYMENT-REQUIRED チャレンジ（base64url、x402 accepts 配列）を返す。accepts の決済方式: 『eip3009』(既定。通常購入の EOA ウォレットはこちらを選び、EIP-712 TransferWithAuthorization に署名する) と『erc20-transfer』(ecrecover 非対応のスマートコントラクトウォレット専用。payer_address を渡した予約にだけ提示される。extra.payerAuthorization.message を personal_sign して authorize_transfer を呼び、その成功後に表示額ぴったりの通常 ERC-20 transfer を実行し、txHash 任意/payerAddress 必須で submit_payment に渡す)。0円デモは demo_signature_version=1 と payer_address を渡すと demo-signature を提示する。送金せず personal_sign だけで完了する。全 item は同一ショップである必要がある。配送が必要な商品があれば shipping を、贈答なら gift_recipient を必ず渡すこと。

shop

get_shop

1 つのショップ（生産者・職人）の詳細を slug で取得する。ショップのストーリーや説明、対応ブロックチェーン、x402 決済が有効かどうかを返す。

shops

list_shops

JPYC EC Platform に出店している公開ショップの一覧を返す。減農薬の農産物・地酒・伝統工芸品など、生産者から直接買えるショップが中心。各ショップの name / slug / 説明 / 対応チェーン / 商品点数を含む。商品を探す起点として最初に呼ぶとよい。

submit

submit_payment

quote_checkout で得た reservation_id と、エージェントが用意した x402 PaymentPayload（base64url）を渡して決済を確定する。demo-signatureならextra.payerAuthorization.messageをpersonal_signし、{payerAddress,demoSignature}を渡す。送金やauthorize_transferは呼ばない。quote_checkout の accepts から選んだ方式に応じて payload の中身が変わる: 『eip3009』なら { signature, authorization } (EIP-712 TransferWithAuthorization の署名)、『erc20-transfer』なら { payerAddress, txHash? } (ウォレットが実行した通常の ERC-20 transferの送金元アドレス。txHash は分かれば渡す任意ヒント — 無くてもサーバがon-chain のログを検索して照合する)。erc20-transfer は送金前に必ず authorize_transfer を成功させる。eip3009 はサーバが facilitator 経由で on-chain settle し、erc20-transfer はユーザーが既に送金したものをサーバが検証するだけ。いずれも確定した注文（order_number / tx_hash）を返す。

Endpoints

URL	Transport	State	Latency	Checked
https://ec.jpyc-service.com/mcp	streamable-http	answering	80 ms	12 min ago

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Ec Storefront — questions

Answers built from our own checks of this server.

What can Ec Storefront do?

It exposes 9 tools, read directly from the server on our last check. Among them: authorize_transfer, get_order_status, get_product, get_shop, list_products_in_shop, list_shops and 3 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Ec Storefront working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 63 of 91 checks got a reply (69.2%), average response time 394 ms. The bar chart above shows every period we have measured.

The registry lists Ec Storefront as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect Ec Storefront?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Ec Storefront need an API key?

No. Ec Storefront completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 9 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Ec Storefront?

It answers our handshake in 394 ms on average, which is faster than 41% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.