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The HaiPay API reference covers cashier flows, international cards, subscriptions, local acquiring and payout capabilities, and stablecoin payment scenarios so merchants can quickly find the right endpoints for each business case. Each API page is organized around real integration tasks, making it easier to review request parameters, response fields, sample payloads, and debugging entry points.

What you’ll find

  • Endpoints for collections, order queries, payouts, payout queries, refunds, and subscription workflows
  • Local payment coverage across Asia, Europe, Latin America, and the Middle East
  • Shared rules for request format, signature validation, asynchronous notifications, and response codes
  • API pages that support direct testing and faster integration troubleshooting

Core capabilities

Cashier

For unified cashier scenarios, including payment creation, query, and versioned query endpoints.

International Cards

Covers card collections, queries, MIT flows, and refund operations.

Card Subscriptions

Includes subscription create, query, cancel, and subscription refund endpoints.

Regional Local Payments

Focused on local collection and payout APIs for Mexico, Turkey, Brazil, Southeast Asia, and more.

Middle East Wallets and Banks

Covers localized payment capabilities for Saudi Arabia, the UAE, Qatar, Oman, Kuwait, Bahrain, and related markets.

Stablecoins

Provides USDT and USDC collection and payout APIs for stablecoin payment scenarios.
  1. Start with Config & Signature to confirm merchant parameters, RSA signing, and request formatting.
  2. Continue with API Description to understand shared fields, signing rules, and response structures.
  3. Move into the relevant API group based on your use case, such as cashier, cards, local payments, or stablecoins.
  4. Before launch, validate your setup with End-to-End Testing and the Onboarding Checklist.

Coverage snapshot

The current API reference spans both global capabilities and localized payment methods, including PayPal, Mexico, Turkey, Brazil, Hong Kong, Singapore, Taiwan, Japan, South Korea, the Philippines, Thailand, Vietnam, Indonesia, India, Malaysia, Pakistan, Bangladesh, Egypt, and multiple Middle East markets. If you want to browse by country or product first, you can also start from the API documentation list.
Last modified on April 15, 2026