Vietnam Payments (MoMo — wallet QR / ATM / cards) MCP server

Check whether a Vietnam payment (created by create_payment_link) has been paid. Queries MoMo directly — a reliable pull-based alternative to webhooks. paid=true when resultCode 0 (status PAID); 1000 = PENDING (buyer has not finished).

Refund a paid Vietnam MoMo payment (created by create_payment_link; MoMo only for now). MoMo refunds always specify the amount in VND — full or partial. Identify the original payment by order_id (this looks up its MoMo transId and, when amount is omitted, the full paid amount) OR pass trans_id + amount directly (trans_id comes from query_payment_status). Refunds respect the same owner policy guardrail (x-agentpay-max-amount) as payments — the refund amount is checked before anything is sent to MoMo.

Create a Vietnam payment link in VND. Aggregates two Vietnamese gateways: MoMo (default; the biggest e-wallet, zero-setup sandbox demo with no headers) and VNPay (bank cards/QR across most Vietnamese banks; send x-vnpay-tmn-code + x-vnpay-hash-secret headers and it is auto-selected, or set provider). Via MoMo, Vietnam's biggest e-wallet. Buyer pays with the MoMo wallet (QR), ATM card, or credit card on MoMo's hosted payment page — payment completes automatically, no confirm step. Amounts in VND dong (integer, e.g. 150000 = 150,000₫; min 1,000 / max 50,000,000). Zero-setup demo: with NO credential headers, requests run against MoMo's public sandbox (test money only, safe to try immediately). For real usage bring your own MoMo business credentials via headers x-momo-partner-code + x-momo-access-key + x-momo-secret-key (from business.momo.vn). Money always flows buyer→MoMo→merchant; this service never touches funds.