Taiwan Payments & E-Invoice (ECPay 綠界 / NewebPay 藍新)

Create a Taiwan payment link (credit card / ATM / convenience store) in TWD. Returns a URL the buyer opens to pay. Supports multiple Taiwan payment gateways — ECPay 綠界 (default; works instantly in a zero-setup demo sandbox, no credentials needed) and NewebPay 藍新金流 (bring your own credentials). Pick with the provider field, or just send a gateway's credential headers and it is auto-selected. Money always flows buyer→gateway→merchant; this service never touches funds.

Void (作廢) a previously issued ECPay e-invoice. Needs the invoice number and its issue date.

Issue a Taiwan government e-invoice (電子發票, B2C) via ECPay. Taiwan law requires an invoice for every sale; this tool issues one and (in production) uploads it to the Ministry of Finance. Works instantly in demo mode (ECPay official sandbox). Supports personal invoices (cloud carrier), company invoices with tax ID (統一編號), and donation.

Check whether a payment (created by create_payment_link) has been paid. Queries the gateway directly — a reliable pull-based alternative to webhooks. Works for ECPay 綠界 and NewebPay 藍新金流.