Numeral MCP by usefulapi

io.usefulapi由 usefulapi.io 發布官方發布者v1.36.5更新於 Nov 8, 2026

Calculate sales tax & VAT, record transactions and refunds, manage products and customers.

發布方自己的服務：Ably MCP by usefulapi

已驗證Streamable HTTP可網頁執行金融商業與電商

概覽

AI 產生的概覽

託管式 Numeral 伺服器，用來計算銷售稅與營業稅，並管理稅務交易、退款、產品與客戶。

可以做什麼
  • 檢查 API 健康狀態與環境、查看本月用量，或提出功能需求與變更方案
  • 依客戶地址與訂單明細計算銷售稅或營業稅，回傳各轄區稅率與合計
  • 依 Numeral 或自有參考 ID 讀取已記錄的交易、退款、產品與客戶
  • 使用先前的計算 ID 將已完成的銷售記錄為交易
  • 為交易記錄全額或部分退款
  • 建立或更新產品，並建立客戶記錄
適用情境
適合需要讓助理為訂單試算銷售稅或營業稅，並讓 Numeral 中的稅務記錄與實際銷售、退款、商品目錄和客戶保持同步，且不想在本機安裝的情況。
執行需求
遠端 streamable HTTP 端點，不需本機安裝套件。只填 URL 並透過 OAuth 登入，首次連線時貼上 Numeral 後台的 API 金鑰。需要 Numeral 帳號；免費方案每月 50 次工具呼叫。
安裝前請注意
寫入類工具會建立供申報使用的即時稅務／合規記錄：交易、退款、產品與客戶，執行前應先確認。付費方案透過升級工具回傳的 Stripe 結帳連結付款，取消後服務持續到已付費期間結束，當期不退費。API 金鑰依使用者儲存在託管服務上。

安裝

在 SourceWeft 中

  1. 開啟 儀表板中的 Numeral MCP by usefulapi，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.usefulapi%2Fnumeral/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": {
    "numeral-by-usefulapi": {
      "type": "http",
      "url": "https://numeral.usefulapi.io/mcp"
    }
  }
}

README

Numeral MCP by usefulapi

Manage Numeral sales-tax compliance from Claude, Cursor, or any MCP client — calculate sales tax and VAT, record transactions and refunds, and manage products and customers. Hosted, no local install: connect with your Numeral API key.

Live endpoint: https://numeral.usefulapi.io/mcp · Homepage: https://usefulapi.io

Connect

  • Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://numeral.usefulapi.io/mcp.
  • Claude Code: claude mcp add --transport http numeral https://numeral.usefulapi.io/mcp, then run /mcp to log in.
  • VS Code: Add to VS Code.
  • Cursor and other clients: add the URL as a remote MCP server:
json
{  "mcpServers": {    "numeral": {      "url": "https://numeral.usefulapi.io/mcp"    }  }}

Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your Numeral credentials.

Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/numeral/

On first connect you'll paste your Numeral API key (from the Numeral dashboard). It's validated, stored per-user, and scoped to you — no keys in config files.

Tools

ToolTypeWhat it does
numeral_pingreadPing (health check)
numeral_calculate_taxreadCalculate tax
numeral_get_transactionreadGet transaction
numeral_list_transaction_refundsreadList transaction refunds
numeral_list_productsreadList products
numeral_get_productreadGet product
numeral_get_customerreadGet customer
numeral_create_transactionwriteCreate transaction
numeral_create_refundwriteCreate refund
numeral_create_productwriteCreate product
numeral_create_customerwriteCreate customer
numeral_usage_statusmetaUsage status (free-tier meter)
numeral_request_featuremetaRequest a missing feature
numeral_upgrademetaUpgrade to Pro or Pro+
numeral_cancel_subscriptionmetaCancel the Pro subscription

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.

Pricing

PlanPriceLimit
Free$050 tool calls / month
Pro (per user)$9/mo or $90/yr (2 months free)Unlimited*

*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to [email protected].

Pro covers this server only. Subscribe with numeral_upgrade (it returns a Stripe Checkout link). Cancel any time with numeral_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running numeral_upgrade before then undoes the cancel. Or write to [email protected].

License

MIT — see LICENSE. Documentation only; the server is hosted.

來源：servers/numeral/README.md，提交 4046075

工具

11

numeral_ping

Ping (health check)

Health check — verifies the API key works and reports the environment (test/prod), api_version, and server timestamp. Numeral: GET /tax/ping.

無需輸入參數。

numeral_calculate_tax

Calculate tax

Calculate sales tax / VAT for an order — a STATELESS quote that persists nothing (record it later with numeral_create_transaction using the returned calculation id). Returns per-jurisdiction rates, total_tax_amount, and totals. Provide a customer address and one or more line items (each needs reference_product_id OR product_category). Amounts are in the currency's smallest unit (cents). Numeral: POST /tax/calculations.

輸入參數customer必填metadataorder_details必填origin_address

numeral_get_transaction

Get transaction

Get a recorded transaction by its Numeral id (tr_...). Returns the transaction with its line items, currencies, and metadata. Numeral: GET /tax/transactions/{transaction_id}.

輸入參數transaction_id必填

numeral_list_transaction_refunds

List transaction refunds

List all refunds recorded against a transaction. Returns {refunds:[...]}. Numeral: GET /tax/transactions/{transaction_id}/refunds.

輸入參數transaction_id必填

numeral_list_products

List products

List your Numeral products (up to 50 per page), each with its reference id, name, and product_category. Use `cursor` (the last_product_id from a previous page) to paginate; has_more indicates more pages. Numeral: GET /tax/products.

輸入參數cursor

numeral_get_product

Get product

Get a single product by its reference_product_id (your id). Returns the product's name, product_category, and timestamps. Numeral: GET /tax/products/{reference_product_id}.

輸入參數reference_product_id必填

numeral_get_customer

Get customer

Get a customer by id. By default `customer_id` is the Numeral id (cus_...); set id_type to "reference" to look up by your own reference_customer_id. Returns name, email, and tax-exempt status. Numeral: GET /tax/customers/{customer_id}.

輸入參數id_typecustomer_id必填

numeral_create_transaction

Create transaction

RECORDS a completed sale as a transaction — this WRITES a live tax/compliance record used for filings. Supply the `calculation_id` returned by numeral_calculate_tax and your `reference_order_id`. Numeral: POST /tax/transactions.

輸入參數metadatacalculation_id必填reference_order_id必填transaction_processed_at

numeral_create_refund

Create refund

RECORDS a refund against a transaction — this WRITES a live tax/compliance record (adjusts tax owed). Use type="full" to refund the whole transaction, or type="partial" with line_items (each keyed by reference_product_id) for a partial refund. Numeral: POST /tax/refunds.

輸入參數type必填line_itemstransaction_id必填refund_processed_at

numeral_create_product

Create product

CREATES (or upserts) a product with its tax category — this WRITES to your Numeral product catalog, which drives future tax calculations. Numeral: POST /tax/products.

輸入參數product_category必填reference_product_id必填reference_product_name必填

numeral_create_customer

Create customer

CREATES a customer record — this WRITES to your Numeral customer list (used for order tracking and tax exemptions). Numeral: POST /tax/customers.

輸入參數nameemail必填is_tax_exemptreference_customer_id

版本歷史

22
  1. v1.36.5最新Nov 8, 2026
  2. v1.36.4Nov 7, 2026
  3. v1.35.3Nov 5, 2026
  4. v1.35.2Nov 5, 2026
  5. v1.35.1Nov 4, 2026
  6. v1.35.0Nov 3, 2026
  7. v1.34.1Nov 3, 2026
  8. v1.33.0Nov 1, 2026
  9. v1.31.0Oct 31, 2026
  10. v1.30.0Oct 31, 2026
  11. v1.29.2Oct 30, 2026
  12. v1.29.0Oct 30, 2026
  13. v1.24.0Oct 26, 2026
  14. v1.21.3Oct 25, 2026
  15. v1.21.0Oct 25, 2026
  16. v1.20.0Oct 24, 2026
  17. v1.17.0Oct 23, 2026
  18. v1.16.4Oct 22, 2026
  19. v1.16.3Oct 21, 2026
  20. v1.11.1Oct 9, 2026
  21. v1.10.0Oct 9, 2026
  22. v1.0.0Sep 16, 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

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