One-Time Payments

Process Flow

Flow diagram

Explanation

• Step 1: Customers check out order at your website and choose MoMo as payment method.
• Step 2: Your server creates a payment session and sends payment request to MoMo.
• Step 3: Switch to MoMo's payment page.
• Step 4: Customers use MoMo app to scan QR code or log in to process payment.
• Step 5: After payment, customers will be redirected back to your website.
• Step 6: Your server authenticates transaction and updates the result for customers.

API configuration

HTTP Information

Payment method

At merchant website, after users choose products or services and make payment using Credit card, Merchant server needs to call MoMo API to retrieve the payment URL, then the merchant website redirects users to payment page.

API information to retrieve payment URL

POST /v2/gateway/api/create

requestType: Identify the type of the request

HTTP Request

Attribute	Type	Required	Description
partnerCode	String		Integration information
partnerName	String		Partner name
storeId	String		Store ID
requestId	String(50)		Request ID, unique for each request, MoMo's partner uses the requestId field for idempotency control
amount	Long		Amount needs to be paid Min: 1.000 VND Max: 10.000.000 VND Currency: VND Data type: Long
orderId	String		Partner Transaction ID Regex: ^[0-9a-zA-Z]([-_.]*[0-9a-zA-Z]+)*$
orderInfo	String		Order's information
redirectUrl	String		A partner's URL. This URL is used to redirect from MoMo page to partner's page after customer's payment. Support: AppLink and WebLink
ipnUrl	String		Partner API. Used by MoMo to submit payment results by IPN method (server-to-server) method
requestType	String		payWithCC
extraData	String		Default value is empty "" Encode base64 follow Jsonformat: {"key": "value"} Example with data: {"username": "momo"}=> data of extraData: eyJ1c2VybmFtZSI6ICJtb21vIn0=
userInfo	Object		Info of the customer, in which email is required.
autoCapture	Boolean		If set to false, the payment will not be automatically captured.
lang	String		Language of returned message (vi or en)
signature	String		HMAC_SHA256accessKey=$accessKey&amount=$amount&extraData= $extraData&ipnUrl=$ipnUrl&orderId=$orderId&orderInfo= $orderInfo&partnerCode=$partnerCode&redirectUrl=$redirectUrl &requestId=$requestId&requestType=$requestType,secretKey)

Details of userInfo content

If this is provided, customer as MoMo user will be receive a notification or email (by choices).

Attribute	Type	Required	Description
name	String		Name of the customer as registered on merchant site
phoneNumber	String		Phone number of the customer as registered on merchant site
email	String		Email address of the customer as registered on merchant site

Redirecting information (redirectUrl)

WebLink: Links to open website.

AppLink: Link to open mobile application.

Learn more about AppLink

• Android: https://developer.android.com/training/app-links
• IOS: https://developer.apple.com/documentation/uikit/core_app/..

Example request

{
 "partnerCode": "MOMO",
 "partnerName" : "Test",
 "storeId" : "MomoTestStore",
 "requestType": "payWithCC",
 "userInfo": {
    
    "email": "email_add@domain.com",
}
 "ipnUrl": "http://www.example.com",
 "redirectUrl": "http://www.example.com",
 "orderId": "6d0a1b10-b382-11e9-8fda-91fa25841420",
 "amount": 30000,
 "lang": "vi",
 "orderInfo": "pay with MoMo Credit card",
 "requestId": "6d0a1b11-b382-11e9-8fda-91fa25841420",
 "extraData": "eyJlbWFpbCI6ICJleGFtcGxlQGdtYWlsLmNvbSJ9",
 "signature": "5344e1f4244173fe0ba2b4c865881aad79b86beff8154b4f74f3b92634ffa711"
}

HTTP Response

List of payment methods that MoMo provides:

Attribute	Type	Required	Description
partnerCode	String		Integration Information
requestId	String		Same as the original request
orderId	String		Partner Transaction ID Regex: ^[0-9a-zA-Z]([-_.]*[0-9a-zA-Z]+)*$
amount	Long		Same as the original payment amount
responseTime	Long		Time to respond payment results to partner Format: timestamp
message	String		Error description, error language is based on lang
resultCode	int		Error code
payUrl	String		URL for switching from the partner's page to the MoMo payment page

Example response

{
  "partnerCode": "MOMO",
  "requestId": "6d0a1b11-b382-11e9-8fda-91fa25841420",
  "orderId": "6d0a1b10-b382-11e9-8fda-91fa25841420",
  "amount": 30000,
  "responseTime": 14547523457,
  "message": "Success",
  "resultCode": 0,
  "payUrl": "https://test-payment.momo.vn/v2/gateway/pay?t=TU9NT1NKSTEyMDE5MDgyM3wxNjEyODQwNTMyNDI3OjAxMjM0NTY3Nzg="
}

Processing payment result

For more information, see Payment Notification.

Parameter description

Description for parameters which are used by MoMo in the URL redirectUrl and the body content of ipnUrl.

Attribute	Type	Required	Description
partnerCode	String		Integration information
requestId	String		Each Request’s Identification
amount	Long		Amount to pay
orderId	String		OrderId of partner, unique for each request
orderType	String		momo_wallet
orderInfo	String		Order info
partnerUserId	String		MoMo's unique identifier for each MoMo eWallet account.
partnerClientid	String		Identifier of user
callbackToken	String		Token info used to get payment token
transId	Long		MoMo's transaction ID
resultCode	Integer		Order status
message	String		description of resultCode based on lang
payType	String		credit
responseTime	Long		Time to return payment result in miliseconds
extraData	String		Additional info
signature	String		Signature to confirm information. Secure transaction in Hmac_SHA256  algorithm with format: a String sort all key name of data field from a-z: accessKey=$accessKey&amount=$amount&callbackToken= $callbackToken&extraData=$extraData&message=$message &orderId=$orderId&orderInfo=$orderInfo&orderType= $orderType&partnerClientId=$partnerClientId &partnerCode=$partnerCode&payType=$payType&requestId= $requestId&responseTime=$responseTime&resultCode= $resultCode&transId=$transId

HTTP Response (IPN)

Partner's response to MoMo after MoMo sends HTTP to the address ipnUrl

Key	Value	Description
HTTP Header	Content-Type: application/json;charset=UTF-8
HTTP Status Code	200

HTTP Payload:

Body of the Response

Parameter	Type	Required	Description
partnerCode	String		Integration Information
requestId	String		Unique ID of each request
orderId	String		Partner Transaction ID Regex: ^[0-9a-zA-Z]([-_.]*[0-9a-zA-Z]+)*$
resultCode	int		Partner's transaction status code of the order
message	String		Partner's transaction status description
responseTime	Long		Response time Format: YYYY-MM-DD HH:mm:ss Time zone: GMT +7
extraData	String		Extra Data
signature	String		HMAC_SHA256accessKey=$accessKey&extraData=$extraData &message=$message&orderId=$orderId&partnerCode=$partnerCode &requestId=$requestId&responseTime=$responseTime&resultCode= $resultCode,secretKey)

For the resultCode and message fields, partner will handle. Refer to the error code of MoMo to return. MoMo will use these information to give feedback to customers if any error occurs in the payment process from partner side.

Result Codes & Messages

Kindly locate result codes and messages of One-time Payment of Credit Card Payments in the comprehensive list of result codes provided here.

See also

• Check Transaction Status
• Reverse & Refund
• Confirm Payment