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Toss Payments

Toss Payments payment window integration guide

1. Configure Toss Payments PG settings

Refer to the Toss Payments settings page to configure the PG settings.

2. Request payment

To open the payment window, call JavaScript SDK IMP.request_pay(param, callback).
In PC browsers, callback is invoked after calling IMP.request_pay(param, callback). In mobile browsers, the page is redirected to m_redirect_url.
Authenticated payment request
Non-authenticated payment request
Non-authenticated API request
Javascript SDK
IMP.request_pay({
pg : 'uplus',
pay_method : 'card',
merchant_uid : '{Merchant created Order ID}', // Example: order_no_0001
name : 'Order name: Test payment request',
amount : 14000,
buyer_email : '[email protected]',
buyer_name : 'John Doe',
buyer_tel : '010-1234-5678',
buyer_addr : 'Shinsa-dong, Gangnam-gu, Seoul',
buyer_postcode : '123-456',
m_redirect_url : '{Mobile only - URL to redirect to after payment approval}' // Example: https://www.my-service.com/payments/complete/mobile
}, function(rsp) { // callback logic
//* ...Omitted... *//
});

Key parameter description

pg *** **string
PG code
  • If not specified and this is the only PG setting that exists, default PG is automatically set.
  • If there are multiple PG settings, set to uplus.
pay_method *** **string
Payment method code
Payment method codes
  • card (credit card)
  • trans(instant account transfer)
  • vbank(virtual account)
  • phone(mobile micropayment)
merchant_uid *** **string
Order ID
Must be unique for each request.
amount *** **integer
Payment amount
Must be an integer (not string).
escrow`` boolean
Ecrow option
Toss Payments payment window
To open non-authenticated payment window, specify the customer_uid parameter. After getting a billing key from this window, you can request payment using the billing key.
Javascript SDK
IMP.request_pay({
pg : 'tosspayments',
pay_method : 'card', // only 'card' supported.
merchant_uid : '{Merchant created Order ID}', // Example: issue_billingkey_monthly_0001
name : 'Initial billing key request',
amount : 0, // For display purpose only (no payment approval).
customer_uid : '{Unique ID for the card (billing key)}', // Required (Example: gildong_0001_1234)
buyer_email: "[email protected]",
buyer_name: "John Doe",
buyer_tel : '02-1234-1234',
m_redirect_url : '{redirect URL}', // Example: https://www.my-service.com/payments/complete/mobile (for mobile only)
customer_id :'matthew' // Merchant user ID
}, function(rsp) {
if ( rsp.success ) {
alert('Success');
} else {
alert('Failed');
}
});
  • To request non-authenticated payment, you must set the MID issued by Toss Payments in the Admin console.
  • Toss Payments does not process the payment when issuing the billing key even if you specify an amount.

Key parameter description

pg *** **string
PG code
  • If not specified and this is the only PG setting that exists, default PG is automatically set.
  • If there are multiple PG settings, set to tosspayments.
customer_uid *** **string
Credit card billing key
Billing key to be mapped 1:1 with the user-entered credit card information.
amount *** **Integer
Payment amount
Amount to display in the payment window, but actual payment approval is not processed. (To request payment, use the REST API with the customer_uid.)
customer_id *** **string
Customer ID
Customer user ID that maps to billing key. If not specified, this is generated by i'mport.\

Request payment with billing key (customer_uid)

After successfully getting the billing key, the billing key is stored on the i'mport server mapped 1:1 with the specified customer_uid. For security reasons, the server cannot directly access the billing key. Subsequent payments can be requested by calling the non-authenticated payment request REST API with the customer_uid as follows:
sever-side
curl -H "Content-Type: application/json" \
-X POST -d '{"customer_uid":"your-customer-unique-id", "merchant_uid":"order_id_8237352", "amount":3000}' \
https://api.iamport.kr/subscribe/payments/again
You can use i'mport REST API to request billing key, request payment, and schedule payment.
MID Issuance
When you get an MID from Toss Payments, the API version must be 1.4.

Request one-time payment

To request a one-time payment, use the key-in REST API POST /subscribe/payments/onetime. The card information is not saved during this process.
curl -H "Content-Type: application/json" \
-X POST -d '{"merchant_uid":"order_id_8237352", "card_number":"1234-1234-1234-1234", "expiry":"2019-01", "birth":"123456", "amount":3000}' \
https://api.iamport.kr/subscribe/payments/onetime

Request billing key

To request a billing key, use the billing key request REST API POST /subscribe/customers/{customer_uid}.
curl -H "Content-Type: application/json" \
-X POST -d '{"card_number":"1234-1234-1234-1234", "expiry":"2025-12", "birth":"820213", "pwd_2digit":"00"}' \
https://api.iamport.kr/subscribe/customers/your-customer-unique-id

Request billing key + initial payment

To request a billing key and initial payment, use the key-in REST API POST /subscribe/payments/onetime.
  • customer_uid : required for saving the billing key.
curl -H "Content-Type: application/json" \
-X POST -d '{"customer_uid":"your-customer-unique-id", "merchant_uid":"order_id_8237352", "card_number":"1234-1234-1234-1234", "expiry":"2019-01", "birth":"123456", "amount":3000}' \
https://api.iamport.kr/subscribe/payments/onetime

Request payment with billing key

After successfully getting the billing key and making the initial payment, the billing key is stored on the i'mport server mapped 1:1 with the specified customer_uid. For security reasons, the server cannot directly access the billing key. Subsequent payments can be requested by calling the repeat pay REST API (POST /subscribe/payments/again) with the customer_uid as follows:
curl -H "Content-Type: application/json" \
-X POST -d '{"customer_uid":"your-customer-unique-id", "merchant_uid":"order_id_8237352", "amount":3000}' \
https://api.iamport.kr/subscribe/payments/again
For detailed information, refer to:

3. Additional functions

Installment setting
Direct credit card module call
Enable specific credit cards
javascript
display: {
card_quota: [6], // Display up to 6 months installment plans
only_installment: true // Disable immediate pay option
}
Parameters
  • card_quota :
    • Enable only specified installment months
    • []: Only immediate pay
    • 2,3,4,5,6: immediate, 2, 3, 4, 5, 6 month installment plans
  • If only_installment: true, only shows specified months in card_quota.\
Installment plan option is available only for KRW 50,000 or more.
javascript
card: {
direct: {
code: "367",
quota: 3
}
}
Parameters
  • code: Credit card code (string)
  • quota: Installment plan. For immediate, set to 0. (integer)
javascript
card : {
detail : [
{card_code:"*", enabled:false}, // Disable all credit cards
{card_code:'366', enabled:true} // Enable specific credit card
]
}
Parameters
  • card_code: Credit card code (string)
  • enabled: Option to enable the credit card (boolean)
Hub-type simple payment
Simple payments (Kakao Pay, Naver Pay, etc.) are not supported in Toss Payments payment window.