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TWINT for API only

Add TWINT to an existing API-only integration.

Accept TWINT payments using our APIs, and build your own payment form to have full control over the look and feel of your checkout page.

Before you begin

These instructions explain how to add TWINT to your existing API-only integration. The API-only integration works the same way for all payment methods. If you haven't yet done this integration, refer to our API-only integration guide.

Before starting your TWINT integration:

  1. Make sure that you have set up your back end implementation.
  2. Add TWINT in your test Customer Area.

Build your payment form for TWINT

Show TWINT as an available payment method in your payment form. You don't need to collect any information from the shopper in your payment form.

We provide a TWINT logo which you can use on your payment form. For more information, refer to Downloading logos.

You can also submit a /paymentMethods request specifying:

  • countryCode: CH
  • amount.currency: CHF.

In the response, you receive paymentMethod.type: twint.

Make a payment

When a shopper chooses to pay with TWINT, you need to redirect them to the TWINT webpage. Depending on how they are accessing your site:

  • For shoppers on mobile, the TWINT webpage offers to open the TWINT app or copy the short code.
  • For shoppers on desktop or laptop, the TWINT webpage offers to scan the QR code with their TWINT app or copy the short code.

From your server, make a /payments request, providing:

  • paymentMethod.type: twint.
  • returnUrl: The URL where the shopper will be redirected back to after completing the payment. Make sure that the returnUrl uses HTTPS.

The following code sample is a /payments request for a TWINT payment.

curl https://checkout-test.adyen.com/v67/payments \
-H "x-API-key: YOUR_X-API-KEY" \
-H "content-type: application/json" \
-d '{
    "merchantAccount": "YOUR_MERCHANT_ACCOUNT",
    "reference": "YOUR_ORDER_NUMBER",
    "amount": {
        "currency": "CHF",
        "value": 1000
    },
    "countryCode": "CH",
    "returnUrl": "https://your-company.com/checkout?shopperOrder=12xy..",
    "paymentMethod": {
        "type": "twint"
    }
}'
# Set your X-API-KEY with the API key from the Customer Area.
adyen = Adyen::Client.new
adyen.api_key = "YOUR_X-API-KEY"
 
response = adyen.checkout.payments({
  :amount => {
    :currency => "CHF",
    :value => 1000
  },
  :reference => "YOUR_ORDER_NUMBER",
  :paymentMethod => {
    :type => "twint"
  },
  :countryCode => "CH",
  :merchantAccount => "YOUR_MERCHANT_ACCOUNT",
  :returnUrl => "https://your-company.com/checkout?shopperOrder=12xy.."
})
// Set YOUR_X-API-KEY with the API key from the Customer Area.
// Change to Environment.LIVE and add the Live URL prefix when you're ready to accept live payments.
    Client client = new Client("YOUR_X-API-KEY", Environment.TEST);
    Checkout checkout = new Checkout(client);

    PaymentsRequest paymentsRequest = new PaymentsRequest();

    String merchantAccount = "YOUR_MERCHANT_ACCOUNT";
    paymentsRequest.setMerchantAccount(merchantAccount);

    Amount amount = new Amount();
    amount.setCurrency("CHF");
    amount.setValue(1000L);
    paymentsRequest.setAmount(amount);

    DefaultPaymentMethodDetails paymentMethodDetails = new DefaultPaymentMethodDetails();
    paymentMethodDetails.setType("twint");
    paymentsRequest.setPaymentMethod(paymentMethodDetails);

    paymentsRequest.setReference("YOUR_ORDER_NUMBER");
    paymentsRequest.setReturnUrl("https://your-company.com/checkout?shopperOrder=12xy..");
    paymentsRequest.setCountryCode("CH");

    PaymentsResponse paymentsResponse = checkout.payments(paymentsRequest);
// Set your X-API-KEY with the API key from the Customer Area.
$client = new \Adyen\Client();
$client->setXApiKey("YOUR_X-API-KEY");
$service = new \Adyen\Service\Checkout($client);

$params = array(
  "amount" => array(
    "currency" => "CHF",
    "value" => 1000
  ),
  "reference" => "YOUR_ORDER_NUMBER",
  "paymentMethod" => array(
    "type" => "twint"
  ),
  "countryCode" => "CH",
  "merchantAccount" => "YOUR_MERCHANT_ACCOUNT",
  "returnUrl" => "https://your-company.com/checkout?shopperOrder=12xy.."
);
$result = $service->payments($params);
#Set your X-API-KEY with the API key from the Customer Area.
adyen = Adyen.Adyen()
adyen.client.xapikey = 'YOUR_X-API-KEY'

result = adyen.checkout.payments({
   'amount': {
      'value': 1000,
      'currency': 'CHF'
   },
   'reference': 'YOUR_ORDER_NUMBER',
   'paymentMethod': {
      'type': 'twint'
   },
   'countryCode': 'CH',
   'merchantAccount': 'YOUR_MERCHANT_ACCOUNT',
   'returnUrl': 'https://your-company.com/checkout?shopperOrder=12xy..'
})
// Set your X-API-KEY with the API key from the Customer Area.
var client = new Client ("YOUR_X-API-KEY", Environment.Test);
var checkout = new Checkout(client);

var amount = new Model.Checkout.Amount("CHF", 1000);
var details = new Model.Checkout.DefaultPaymentMethodDetails{
  Type = "twint"
};
var paymentRequest = new Adyen.Model.Checkout.PaymentRequest
{
  Reference = "YOUR_ORDER_NUMBER",
  Amount = amount,
  CountryCode = "CH",
  MerchantAccount = "YOUR_MERCHANT_ACCOUNT",
  PaymentMethod = details,
  ReturnUrl = "https://your-company.com/checkout?shopperOrder=12xy.."
};

var paymentResponse = checkout.Payments(paymentsRequest);
// Set your X-API-KEY with the API key from the Customer Area.
const {Client, Config, CheckoutAPI} = require('@adyen/api-library');
const config = new Config();
// Set your X-API-KEY with the API key from the Customer Area.
config.apiKey = '[API_KEY]';
config.merchantAccount = '[YOUR_MERCHANT_ACCOUNT]';
const client = new Client({ config });
client.setEnvironment("TEST");
const checkout = new CheckoutAPI(client);
checkout.payments({
    amount: { currency: "CHF", value: 1000 },
    paymentMethod: {
        type: 'twint'
    },
    reference: "YOUR_ORDER_NUMBER",
    merchantAccount: config.merchantAccount,
    countryCode: "CH",
    returnUrl: "https://your-company.com/checkout?shopperOrder=12xy.."
}).then(res => res);

The /payments response contains:

  • action: The object containing information that you will need to redirect the shopper to the TWINT webpage.
/payments response
{
    "resultCode": "RedirectShopper",
    "action": {
        "paymentMethodType": "twint",
        "type": "redirect",
        "url": "https://checkoutshopper-test.adyen.com/checkoutshopper/checkoutPaymentRedirect?redirectData=X6XtfGC3...",
        "method": "GET"
    }
}

Handle the redirect result

  1. To complete the payment, redirect the shopper to the action.url returned in the /payments response.

    When using the HTTP GET method:
    For security reasons, when displaying the redirect in the app, we recommend that you use SFSafariViewController for iOS or Chrome Custom Tabs for Android, instead of WebView objects. Also refer to the security best practices for WebView.

  2. URL-decode the redirectResult that was appended to your returnUrl when the shopper was redirected back to your website, and pass it to your back end.
  3. Check the payment result by making a POST /payments/details request, specifying:

    • details.redirectResult: Object that contains the URL-decoded redirectResult.
    /payments/details request
    {
         "details":{
           "redirectResult": "X6XtfGC3!Y..."
         }
    }

    You receive a response containing:

    • resultCode: Use this to present the result to your shopper.
    • pspReference: Our unique identifier for the transaction.
    /payments/details response
     {
       "resultCode": "Authorised",
       "pspReference": "88154795347618C"
     }

Present the payment result

Use the resultCode that you received in the /payments/details response to present the payment result to your shopper.

You will also receive the outcome of the payment asynchronously in a notification webhook.

The resultCode values you can receive for TWINT are:

resultCode Description Action to take
Authorised The shopper completed their payment, and it has been sent to the bank for processing. In most cases, this means that you will receive the funds. If you are using manual capture, you also need to capture the payment. Inform the shopper that the payment has been successful.
Cancelled The shopper cancelled the payment while on their bank's website. Ask the shopper whether they want to continue with the order, or ask them to select a different payment method.
Error There was an error when the payment was being processed. Inform the shopper that there was an error processing their payment. The response contains a refusalReason, indicating the cause of the error.
Pending or
Received
The shopper has completed the payment but the final result is not yet known. Inform the shopper that you've received their order, and are waiting for the payment to be completed.
You will receive the final result of the payment in an AUTHORISATION notification.
Refused The payment was refused by the shopper's bank. Ask the shopper to try the payment again using a different payment method.

If the shopper failed to return to your website or app, wait for notification webhooks to know the outcome of the payment. The notification webhooks you can receive for TWINT are:

eventCode success field Description Action to take
AUTHORISATION false The transaction failed. Cancel the order and inform the shopper that the payment failed.
AUTHORISATION true The shopper successfully completed the payment. Inform the shopper that the payment has been successful and proceed with the order.

Capture the payment

By default, TWINT payments are captured automatically. This means that the Capture Delay setting in your Customer Area is set to Immediate or 1–7 days.
In case the Capture Delay setting is set to Manual, then you need to manually capture the payment.

Partial capture

To partially capture a TWINT payment, specify in your /capture request:

  • modificationAmount: The amount that the shopper should pay.

The following example shows how to make a partial capture request:

/capture request
{
   "originalReference":"PSP_REFERENCE",
   "merchantAccount":"YOUR_MERCHANT_ACCOUNT",
   "modificationAmount":{
      "currency":"CHF",
      "value":"700"
   },
   "reference":"YOUR_CAPTURE_REFERENCE"
}

Any unclaimed amount that is left over after partially capturing a payment is automatically cancelled.

TWINT doesn't support multiple partial captures.

Test and go live

Check the status of TWINT test payments in your Customer Area > Transactions > Payments.
Before you can accept live TWINT payments, you need to submit a request for TWINT in your live Customer Area.

See also