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Clearpay for API only

Add Clearpay to an existing API-only integration.

Accept Clearpay 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 Clearpay to your existing API-only integration. The API-only integration works the same way for all payment methods. If you haven't done this integration yet, refer to our API-only integration guide.

Before starting your integration:

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

Build your payment form for Clearpay

If you're using /paymentMethods to show which payment methods are available to the shopper,
specify the following combination of countryCode and amount.currency:

Country countryCode amount.currency
United Kingdom GB GBP

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

To perform risk checks, Clearpay requires you to collect the following shopper details:

  • Full name
  • Email address
  • Billing address and delivery address.

Make a payment

Make a /payments request from your server, specifying:

  • paymentMethod: clearpay
curl https://checkout-test.adyen.com/v67/payments \
-H "x-API-key: YOUR_X-API-KEY" \
-H "content-type: application/json" \
-d '{
  "paymentMethod":{
    "type":"clearpay"
  },
  "amount":{
     "value":1000,
     "currency":"GBP"
  },
  "shopperName":{
     "firstName":"Simon",
     "lastName":"Hopper"
  },
  "shopperEmail":"s.hopper@example.com",
  "shopperReference":"YOUR_UNIQUE_SHOPPER_ID",
  "reference":"YOUR_ORDER_REFERENCE",
  "merchantAccount":"YOUR_MERCHANT_ACCOUNT",
  "returnUrl":"https://your-company.com/checkout?shopperOrder=12xy..",
  "countryCode":"GB",
  "telephoneNumber":"+44 203 936 4029",
  "billingAddress":{
     "city":"London",
     "country":"GB",
     "houseNumberOrName":"8-10",
     "postalCode":"SW1H 0BG",
     "stateOrProvince":"Westminster",
     "street":"Broadway"
  },
  "deliveryAddress":{
     "city":"London",
     "country":"GB",
     "houseNumberOrName":"8-10",
     "postalCode":"SW1H 0BG",
     "stateOrProvince":"Westminster",
     "street":"Broadway"
  },
  "lineItems":[
     {
        "description":"Shoes",
        "quantity":"1",
        "amountIncludingTax":"400",
        "amountExcludingTax": "331",
        "taxAmount": "69",
        "id":"Item #1"
     },
     {
        "description":"Socks",
        "quantity":"2",
        "amountIncludingTax":"300",
        "amountExcludingTax": "248",
        "taxAmount": "52",
        "id":"Item #2"
     }
  ]
}'
# 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({
  :merchantAccount => "YOUR_MERCHANT_ACCOUNT",
  :reference => "YOUR_ORDER_NUMBER",
  :amount => {
    :currency => "GBP",
    :value => 1000
  },
  :paymentMethod => {
    :type => "clearpay"
  },
  :returnUrl => "https://your-company.com/checkout?shopperOrder=12xy..",
  :countryCode => "GB",
  :shopperName => [
    :firstName => "Simon",
    :lastName => "Hopper"
  ],
  :shopperEmail => "s.hopper@example.com",
  :shopperReference => "YOUR_UNIQUE_SHOPPER_ID",
  :telephoneNumber => "+44 203 936 4029",
  :billingAddress => {
    :city => "London",
    :country => "GB",
    :houseNumberOrName => "8-10",
    :postalCode => "SW1H 0BG",
    :stateOrProvince => "Westminster",
    :street => "Broadway"
  },
  :deliveryAddress => {
    :city => "London",
    :country => "GB",
    :houseNumberOrName => "8-10",
    :postalCode => "SW1H 0BG",
    :stateOrProvince => "Westminster",
    :street => "Broadway"
  },
  :lineItems => [
    {
      :description => "Shoes",
      :quantity => "1",
      :amountIncludingTax => "400",
      :amountExcludingTax => "331",
      :taxAmount => "69",
      :id => "Item #1"
    },
    {
      :description => "Socks",
      :quantity => "2",
      :amountIncludingTax => "300",
      :amountExcludingTax => "248",
      :taxAmount => "52",
      :id => "Item #2"
    }
  ]
})
// 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("GBP");
amount.setValue(1000L);
paymentsRequest.setAmount(amount);

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

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

Name shopperDetails = new Name();
shopperDetails.setFirstName("Simon");
shopperDetails.setLastName("Hopper");

paymentsRequest.setShopperName(shopperDetails);
paymentsRequest.setShopperReference("YOUR_UNIQUE_SHOPPER_ID");
paymentsRequest.setCountryCode("GB");
paymentsRequest.setTelephoneNumber("+44 203 936 4029");
paymentsRequest.setShopperEmail("s.hopper@example.com");

BillingAddress billingAddress = new BillingAddress();
billingAddress.setCountry("GB");
billingAddress.setCity("London");
billingAddress.setHouseNumberOrName("8-10");
billingAddress.setStreet("Broadway");
billingAddress.setPostalCode("SW1H 0BG");
billingAddress.setStateOrProvince("Westminster");

paymentsRequest.setBillingAddress(billingAddress);

DeliveryAddress deliveryAddress = new DeliveryAddress();
deliveryAddress.setCountry("GB");
deliveryAddress.setCity("London");
deliveryAddress.setHouseNumberOrName("8-10");
deliveryAddress.setStreet("Broadway");
deliveryAddress.setPostalCode("SW1H 0BG");
deliveryAddress.setStateOrProvince("Westminster");

paymentsRequest.setDeliveryAddress(deliveryAddress);

List<LineItem> lineItems = new ArrayList<>();
lineItems.add(
        new LineItem()
                .quantity(1L)
                .description("Shoes")
                .id("Item #1")
                .amountIncludingTax(400L)
                .amountExcludingTax(331L)
                .taxAmount(69L)
);
lineItems.add(
        new LineItem()
            .quantity(2L)
            .description("Socks")
            .id("Item #2")
            .amountIncludingTax(300L)
            .amountExcludingTax(248L)
            .taxAmount(52L)
);

paymentsRequest.setLineItems(lineItems);

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 = [
  "merchantAccount" => "YOUR_MERCHANT_ACCOUNT",
  "reference" => "YOUR_ORDER_NUMBER",
  "amount" => [
    "currency" => "GBP",
    "value" => 1000
  ],
  "paymentMethod" => [
    "type" => "clearpay"
  ],
  "returnUrl" => "https://your-company.com/checkout?shopperOrder=12xy..",
  "countryCode" => "GB",
  "shopperName" => [
       "firstName" => "Simon",
       "lastName" => "Hopper"
  ],
  "shopperEmail" => "s.hopper@example.com",
  "shopperReference" => "YOUR_UNIQUE_SHOPPER_ID",
  "telephoneNumber" => "+44 203 936 4029",
  "billingAddress" => [
       "city" => "London",
       "country" => "GB",
       "houseNumberOrName" => "8-10",
       "postalCode" => "SW1H 0BG",
       "stateOrProvince" => "Westminster",
       "street" => "Broadway"
  ],
  "deliveryAddress" => [
       "city" => "London",
       "country" => "GB",
       "houseNumberOrName" => "8-10",
       "postalCode" => "SW1H 0BG",
       "stateOrProvince" => "Westminster",
       "street" => "Broadway"
  ],
  "lineItems" => [
     [
        "description" => "Shoes",
        "quantity" => "1",
        "amountIncludingTax" => "400",
        "amountExcludingTax" => "331",
        "taxAmount" => "69",
        "id" => "Item #1"
     ],
     [
        "description" => "Socks",
        "quantity" => "2",
        "amountIncludingTax" => "300",
        "amountExcludingTax" => "248",
        "taxAmount" => "52",
        "id" => "Item #2"
     ]
    ]
];
$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({
   "merchantAccount": "YOUR_MERCHANT_ACCOUNT",
   "reference": "YOUR_ORDER_NUMBER",
   "amount": {
      "value": 1000,
      "currency": "GBP"
   },
   "paymentMethod": {
      "type": "clearpay"
   },
   "returnUrl": "https://your-company.com/checkout?shopperOrder=12xy..",
   "countryCode":"GB",
   "shopperName": {
      "firstName":"Simon",
      "lastName":"Hopper"
   },
   "shopperEmail":"s.hopper@example.com",
   "shopperReference":"YOUR_UNIQUE_SHOPPER_ID",
   "telephoneNumber":"+44 203 936 4029",
   "billingAddress":{
      "city":"London",
      "country":"GB",
      "houseNumberOrName":"8-10",
      "postalCode":"SW1H 0BG",
      "stateOrProvince":"Westminster",
      "street":"Broadway"
   },
   "deliveryAddress":{
      "city":"London",
      "country":"GB",
      "houseNumberOrName":"8-10",
      "postalCode":"SW1H 0BG",
      "stateOrProvince":"Westminster",
      "street":"Broadway"
   },
   "lineItems":[
      {
         "description":"Shoes",
         "quantity":"1",
         "amountIncludingTax":"400",
         "amountExcludingTax": "331",
         "taxAmount": "69",
         "id":"Item #1"
      },
      {
         "description":"Socks",
         "quantity":"2",
         "amountIncludingTax":"300",
         "amountExcludingTax": "248",
         "taxAmount": "52",
         "id":"Item #2"
      }
   ]
})
// 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 paymentRequest = new Adyen.Model.Checkout.PaymentRequest
{
   MerchantAccount = "YOUR_MERCHANT_ACCOUNT",
   Reference = "YOUR_ORDER_REFERENCE",
   PaymentMethod = new DefaultPaymentMethodDetails { Type = "clearpay" },
   Amount = new Model.Checkout.Amount(Currency: "GBP", Value: 1000),
   CountryCode = "GB",
   TelephoneNumber = "+44 203 936 4029",
   ShopperEmail = "s.hopper@example.com",
   ShopperName = new Model.Checkout.Name
   {
       FirstName = "Simon",
       LastName = "Hopper"
   },
   ShopperReference = "YOUR_UNIQUE_SHOPPER_ID",
   BillingAddress = new Model.Checkout.Address
   {
       City = "London",
       Country = "GB",
       HouseNumberOrName = "8-10",
       PostalCode = "SW1H 0BG",
       StateOrProvince = "Westminster",
       Street = "Broadway"
   },
   DeliveryAddress = new Model.Checkout.Address
   {
       City = "London",
       Country = "GB",
       HouseNumberOrName = "8-10",
       PostalCode = "SW1H 0BG",
       StateOrProvince = "Westminster",
       Street = "Broadway"
   },
   ReturnUrl = "https://your-company.com/checkout?shopperOrder=12xy..",
   LineItems = new List<LineItem>
   {
     new LineItem(Quantity:1, Description:"Shoes",Id:"Item #1", AmountIncludingTax:400, AmountExcludingTax: 331, TaxAmount: 69),
     new LineItem(Quantity:2, Description:"Socks",Id:"Item #2", AmountIncludingTax:300, AmountExcludingTax: 248, TaxAmount: 52)
   }
};
return paymentRequest;
}
// 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: "GBP",
       value: 1000
    },
    paymentMethod: {
        type: 'clearpay'
    },
    reference: "YOUR_ORDER_NUMBER",
    shopperReference: "YOUR_UNIQUE_SHOPPER_ID",
    merchantAccount: config.merchantAccount,
    returnUrl: "https://your-company.com/checkout?shopperOrder=12xy..",
    countryCode: "GB",
    shopperName: {
        firstName: "Simon",
        lastName: "Hopper"
    },
    shopperEmail: "s.hopper@example.com",
    telephoneNumber:"+44 203 936 4029",
    billingAddress: {
        city:"London",
        country:"GB",
        houseNumberOrName:"8-10",
        postalCode:"SW1H 0BG",
        stateOrProvince:"Westminster",
        street:"Broadway"
    },
    deliveryAddress: {
        city:"London",
        country:"GB",
        houseNumberOrName:"8-10",
        postalCode:"SW1H 0BG",
        stateOrProvince:"Westminster",
        street:"Broadway"
    },
    lineItems: [
       {
          description":"Shoes",
          quantity:"1",
          amountIncludingTax:"400",
          amountExcludingTax: "331",
          taxAmount: "69",
          id:"Item #1"
       },
       {
          description:"Socks",
          quantity:"2",
          amountIncludingTax:"300",
          amountExcludingTax: "248",
          taxAmount: "52",
          id:"Item #2"
       }
    ]
}).then(res => res);

The /payments response contains an action object with the information needed to redirect the shopper.

/payments response 
{
   "resultCode":"RedirectShopper",
   "action":{
      "paymentMethodType":"clearpay",
      "method":"GET",
      "url":"https://checkoutshopper-test.adyen.com/checkoutshopper/checkoutPaymentRedirect?redirectData=...",
      "type":"redirect"
   }
}

Handle the redirect

  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. After the shopper is redirected back to your website, check the payment result by making a POST /payments/details request, specifying:
    • details: Object that contains the URL-decoded redirectResult returned when the shopper was redirected back to your site.
    /payments/details request 
    curl https://checkout-test.adyen.com/v67/payments/details \
-H "x-API-key: YOUR_X-API-KEY" \
-H "content-type: application/json" \
-d '{
   "details": {
     "redirectResult": "eyJ0cmFuc1N0YXR1cyI6IlkifQ=="
 }
}'

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.
The resultCode values you can receive for Clearpay are:

resultCode Description Action to take
Authorised The payment was successful. Inform the shopper that the payment was successful.
Cancelled The shopper cancelled the payment. Ask the shopper whether they want to continue with the order, or ask them to select a different payment method.
Pending or
Received 		The shopper has completed the payment but the final result is not yet known. It may take minutes or hours to confirm this. Inform the shopper that you've received their order, and are waiting for the payment to be completed.
To know the final result of the payment, wait for the AUTHORISATION notification.
Refused The payment was refused by Clearpay. 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:

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

Depending on your merchant account configuration, Clearpay payments are captured automatically after authorisation, or manually captured.
If you prefer to capture the payment after the goods have been sent, or if you want to partially capture payments, you need to set up a capture delay or use manual capture. When you use manual capture, Clearpay payments have to be captured within 13 days after authorisation.
During authorisation, the shopper is charged for the first installment. If the payment isn't captured within 13 days, before the second installment, Clearpay cancels the payment and refunds the first installment to the shopper.

Partial captures

To partially capture a payment, specify in your /payments/{paymentPspReference}/captures request:

  • modificationAmount: The amount that the shopper should pay. 
  • additionalData.openinvoicedata: Optional Price and product information for the items that the shopper should pay for.

Although the field names are different, the information in additionalData.openinvoicedata is the same as what you provided in lineItems when making a /payments request:

openinvoicedata lineItems Description
itemAmount amountExcludingTax The price for one item, without the tax, in minor units.
itemVatAmount taxAmount The tax amount for one item, in minor units.

The following example shows how to make a partial capture request if the shopper only kept one pair of socks from the two included in the original payment request.

/capture request 
{
   "originalReference":"COPY_PSP_REFERENCE_FROM_AUTHORISE_RESPONSE",
   "merchantAccount":"YOUR_MERCHANT_ACCOUNT",
   "modificationAmount":{
      "currency":"GBP",
      "value":"700"
   },
   "additionalData":{
      "openinvoicedata.numberOfLines":"2",
      "openinvoicedata.line1.currencyCode":"GBP",
      "openinvoicedata.line1.description":"Shoes",
      "openinvoicedata.line1.itemAmount":"331",
      "openinvoicedata.line1.itemVatAmount":"69",
      "openinvoicedata.line1.numberOfItems":"1",
      "openinvoicedata.line2.currencyCode":"GBP",
      "openinvoicedata.line2.description":"Socks",
      "openinvoicedata.line2.itemAmount":"248",
      "openinvoicedata.line2.itemVatAmount":"52",
      "openinvoicedata.line2.numberOfItems":"1",
   },
   "reference":"YOUR_CAPTURE_REFERENCE"
}

Any unclaimed amount that is left over after partially capturing a payment is automatically cancelled. When your account is enabled for multiple partial captures, the unclaimed amount after an initial capture is not automatically cancelled.

To set up multiple partial captures, contact our Support Team. Multiple partial captures will create a new invoice for each capture. 

Refunds and cancellations

If a payment has not yet been captured, you can cancel it. If the Clearpay payment has already been captured and you want to return the funds to the shopper, you need to refund it.

Partial refunds

To partially refund a payment, specify in your /payments/{paymentPspReference}/refunds request:

  • modificationAmount: The amount to be refunded to the shopper.
  • additionalData.openinvoicedata: Optional Price and product information about the returned items.

Providing additionalData.openinvoicedata is optional, and although the field names are different, the information is the same as what you provided in lineItems when making a /payments request:

openinvoicedata lineItems Description
itemAmount amountExcludingTax The price for one item, without the tax, in minor units.
itemVatAmount taxAmount The tax amount for one item, in minor units.

The following example shows how to make a partial refund request if the shopper returned the shoes included in the original payment request.

/refund request 
{
   "merchantAccount":"YOUR_MERCHANT_ACCOUNT",
   "originalReference":"COPY_PSP_REFERENCE_FROM_AUTHORISE_RESPONSE",
   "modificationAmount":{
      "currency":"EUR",
      "value":"400"
   },
   "additionalData":{
      "openinvoicedata.numberOfLines":"1",
      "openinvoicedata.line1.currencyCode":"GBP",
      "openinvoicedata.line1.description":"Shoes",
      "openinvoicedata.line1.itemAmount":"331",
      "openinvoicedata.line1.itemVatAmount":"69",
      "openinvoicedata.line1.numberOfItems":"1"
   },
   "reference":"YOUR_REFUND_REFERENCE"
}

Discounts

To offer discounts, specify in your /payments request the negative amount to be added to the original price. The following example shows how to specify a discount of 10 GBP on Item 2:

{
  "amount":{
     "value":7850,
     "currency":"GBP"
  },
  ...
  "lineItems":[

     {
        "description":"Test Clearpay 1",
        "quantity":"1",
        "amountIncludingTax":"4550",
        "id":"Item #1"
     },
     {
        "description":"Test Clearpay 2",
        "quantity":"2",
        "amountIncludingTax":"2650",
        "id":"Item #2"
     }

     {
        "description":"Discount",
        "quantity":"2",
        "amountIncludingTax":"-1000",
        "id":"Item #2 Discount"
     }
  ]
}

Test and go live

To test Clearpay payments, you need a test shopper account in the Clearpay sandbox environment.
To create a test account:

  1. Go to https://portal.sandbox.clearpay.co.uk/
  2. Enter a real email address and select Continue. You'll get confirmations of payments and refunds like any other shopper on this email address.
  3. Enter any mobile telephone number that is formatted correctly, and select Continue. Check the input box for hints on the format. The phone number won't be used.
  4. When you are prompted to enter your SMS verification code, enter 111111.
  5. Follow the instructions on your screen to complete your profile, accept the terms and conditions, and select Continue.

To test payments, add a test card to your Clearpay test shopper account.
You can use the card details provided in the Clearpay developer documentation, or use one of the Adyen test cards. Use CVV 000 to simulate authorised payments, or CVV 051 to simulate refused payments.

You can check the status of test payments in your Customer Area > Transactions > Payments.

Before you can accept live Clearpay payments, you need to submit a request for Clearpay in your live Customer Area.

See also