1. 3.2.2 Payment Transaction Processing
EurewaX Open API
  • Basic Conventions
    • Global Conventions
    • Message Structure
    • Signature
    • Encryption
  • Interaction Flow
    • Business Application Flow
  • Business APIs
    • 1 Common Services
      • 1.1 Event Notifications
        • Configure NotificationURL
      • 1.2 File Service
        • Upload File
        • supplementary business Document
      • 1.3 Authentication Service
        • Get Merchant Token
    • 2 Onboarding Services
      • 2.1 Merchant Onboarding
        • Register Merchant
        • KYCApply for
        • KYBApply for
        • Query KYCReview Result
        • KYCReview ResultNotification
        • Query KYBReview Result
        • KYBReview ResultNotification
        • Get can open through Product List
    • 3 Fiat Services
      • 3.1 Collection Services
        • 3.1.1 Collection Store Management
          • Get Platform Site
          • Add Store Owner
          • Bind Store
          • Query Store Information
        • 3.1.2 VA Account Services
          • Apply for VAAccount Number
          • Download Account OpeningCertificate
          • Query VAAccount Number
          • VAAccount NumberChange Notification
        • 3.1.3 Collection Transaction Processing
          • Collection Crediting Notification
      • 3.2 Payment Services
        • 3.2.1 Payee Management
          • Add Payee
          • Delete Payee
          • Query Payee Review Result
          • Payee Review ResultNotification
        • 3.2.2 Payment Transaction Processing
          • Single Payment
            POST
          • Payment ResultNotification
        • 3.2.3 Settlement Quota Management
          • Query FX Settlement Quota
          • Upload FX Settlement Document
          • Query FX Settlement Document Review Result
          • FX Settlement Document Review ResultNotification
      • 3.3 Foreign Exchange Services
        • Query Merchant Exchange Rate
        • Merchant FX Quote
        • Real-time FX
      • 3.4 Account Services
        • 3.4.1 Account Management
          • Account Query
          • Account Authorization
          • Cancel authorization
        • 3.4.2 Account Transactions
          • Account Transfer
          • Batch Transfer
          • Funds Pooling
          • Funds PoolingResultNotification
          • Batch TransferResultNotification
          • Per-transaction TransferResultNotification
      • 3.5 Transaction Queries
        • 3.5.1 Transaction Details
          • Funds PoolingTransaction Details
          • Payment Transaction Details
          • Collection Transaction Details
          • TransferTransaction Details
          • FX Exchange Transaction Details
        • Download Transaction Certificate
        • Query Transaction Details
    • 4 Crypto Services
      • 4.1 Basic Functions
        • Query Exchange Rate
        • Query Supported of asset
      • 4.2 Account Management
        • Query Account List
      • 4.3 Collection Instrument Management
        • Query Collection Instrument
      • 4.4 Payee Management
        • Add Payee
        • Delete Payee
        • Query Payee List
        • Payee Review ResultNotification
      • 4.5 Transaction Management
        • Fiat Deposit
          • Fiat Deposit
        • Fiat Withdrawal
          • Fiat Withdrawal
        • Crypto Deposit
          • Crypto Deposit
        • Crypto Withdrawal
          • Crypto Withdrawal
        • Crypto Buy
          • Get Crypto Buy Quote
          • Buy Crypto
        • Crypto Sell
          • Get Crypto Sell Quote
          • Sell Crypto
        • Fiat convert Crypto
          • Get fiat-to-cryptoQuote
          • Fiat convert Crypto
        • Crypto convert Fiat
          • Get crypto-to-fiatQuote
          • Crypto convert Fiat
        • Deposit/WithdrawalTransaction Fee estimate
        • Query Transaction Details
        • Query Transaction record
        • Transaction ResultNotification
    • 5 VCC Services
      • 5.1 Card Application Services
        • Query Product List
        • Virtual Card Apply for
        • Query Apply for Details
        • Card Apply for ResultNotification
      • 5.2 Card Information Query Services
        • Query Card CVV
        • Query Card Information
        • Query Card Balance
      • 5.3 Card Management Services
        • Unfreeze Card
        • Activate Card
        • Cancel Card
        • Freeze Card
        • Update Card Limit
        • Update Cardholder
        • Card StatusChange Notification
      • 5.4 Card Transaction Services
        • Funds Transfer In
        • Funds Transfer Out
        • Query non-authorization Transaction Details
        • Query Transaction List
        • Query Card Funds Details
        • Card Transaction ResultNotification
        • Card 3DSVerificationNotification
    • 6 Unified Checkout
      • Create Order
      • Query Order Details
      • Payment ResultNotification
  • Integration Testing
    • Overall Flow
    • Environment Parameters
  • Appendix
    • Enum Type
    • KYCtemplate
    • KYBtemplate
  • Schemas
    • TransferOrder
  1. 3.2.2 Payment Transaction Processing

Single Payment

POST
/api/v1/ex/fundout/txn/pay
Supports payments to the merchant or to third parties, with optional POBO designation.
The receiving currency is determined by the account currency of the payee identified by payeeId.

Request

Header Params

Body Params application/json

Example
{
    "productCode": "FOUND_OUT",
    "merchantNo": "25052514323069",
    "bizOrderNo": "20251203001043",
    "payeeAccountId": "HK30720260104020315697",
    "payerCurrency": "USD",
    "payerAmount": 50,
    "feeType":"SHA",
    "reference": "yyyy",
    "paymentPurpose":"ADVERTISEMENT"
}

Request Code Samples

Shell
JavaScript
Java
Swift
Go
PHP
Python
HTTP
C
C#
Objective-C
Ruby
OCaml
Dart
R
Request Request Example
Shell
JavaScript
Java
Swift
curl --location '/api/v1/ex/fundout/txn/pay' \
--header 'x-app-id;' \
--header 'x-request-id;' \
--header 'x-signature;' \
--header 'Content-Type: application/json' \
--data '{
    "productCode": "FOUND_OUT",
    "merchantNo": "25052514323069",
    "bizOrderNo": "20251203001043",
    "payeeAccountId": "HK30720260104020315697",
    "payerCurrency": "USD",
    "payerAmount": 50,
    "feeType":"SHA",
    "reference": "yyyy",
    "paymentPurpose":"ADVERTISEMENT"
}'

Responses

🟢200Success
application/json
Bodyapplication/json

Example
{
    "code": "string",
    "message": "string",
    "data": {
        "transactionId": "string",
        "status": "string",
        "transactionType": "string",
        "productCode": "string",
        "bizOrderNo": "string"
    }
}
Modified at 2026-08-08 08:08:06
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