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GrabPay for API only

Add GrabPay to an existing API-only integration.

Accept GrabPay 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 GrabPay 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 GrabPay integration:

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

Build your payment form for GrabPay

To show GrabPay in your payment form, you need to:

  1. Include GrabPay in the list of available payment methods.
  2. After the shopper selects GrabPay, pass the payment method type to your server:
    • grabpay_MY if the shopper is in Malaysia and is paying with Malaysian Ringgit.
    • grabpay_PH if the shopper is in the Philippines and is paying with Philippine Peso.
    • grabpay_SG if the shopper is in Singapore and is paying with Singapore Dollars.

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

You can also get the paymentMethod.type from the /paymentMethods response as explained in the API-only integration guide. In your /paymentMethods request, specify:

Country countryCode amount.currency
Malaysia MY MYR
Philippines PH PHP
Singapore SG SGD

Get the corresponding paymentMethod.type from the response.

Make a payment

In your /payments request, specify:

  • paymentMethod.type: grabpay_XX, where XX is the country code. You can also refer to the /paymentMethods response you received.
  • returnUrl: The URL where the shopper will be redirected back to after they complete the payment.
curl https://checkout-test.adyen.com/v52/payments \
-H "x-API-key: YOUR_X-API-KEY" \
-H "content-type: application/json" \
-d '{
     "amount": {
       "currency": "SGD",
       "value": 1000
     },
     "reference": "YOUR_ORDER_NUMBER",
     "paymentMethod": {
       "type": "grabpay_SG"
     },
     "returnUrl": "https://your-company.com/checkout?shopperOrder=12xy..",
     "merchantAccount": "YOUR_MERCHANT_ACCOUNT"
}'
# 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 => "SGD",
    :value => 1000
  },
  :reference => "YOUR_ORDER_NUMBER",
  :paymentMethod => {
    :type => "grabpay_SG"
  },
  :returnUrl => "https://your-company.com/checkout?shopperOrder=12xy..",
  :merchantAccount => "YOUR_MERCHANT_ACCOUNT"
})
// 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("SGD");
    amount.setValue(15000L);
    paymentsRequest.setAmount(amount);

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

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

    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" => "SGD",
    "value" => 1000
  ),
  "reference" => "YOUR_ORDER_NUMBER",
  "paymentMethod" => array(
    "type" => "grabpay_SG"
  ),
  "returnUrl" => "https://your-company.com/checkout?shopperOrder=12xy..",
  "merchantAccount" => "YOUR_MERCHANT_ACCOUNT"
);
$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': 'SGD'
   },
   'reference': 'YOUR_ORDER_NUMBER',
   'paymentMethod': {
      'type': 'grabpay_SG'
   },
   'returnUrl': 'https://your-company.com/checkout?shopperOrder=12xy..',
   'merchantAccount': 'YOUR_MERCHANT_ACCOUNT'
})
// 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("SGD", 1000);
var details = new Model.Checkout.DefaultPaymentMethodDetails{
  Type = "grabpay_SG"
};
var paymentRequest = new Adyen.Model.Checkout.PaymentRequest
{
  Reference = "YOUR_ORDER_NUMBER",
  Amount = amount,
  ReturnUrl = @"https://your-company.com/checkout?shopperOrder=12xy..",
  MerchantAccount = "YOUR_MERCHANT_ACCOUNT",
  PaymentMethod = details
};

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: "SGD", value: 1000 },
    paymentMethod: {
        type: 'grabpay_SG'
    },
    reference: "YOUR_ORDER_NUMBER",
    merchantAccount: config.merchantAccount,
    returnUrl: "adyencheckout://your.package.name"
}).then(res => res);

The /payments response contains:

  • action.url: Link to where you should redirect your shopper.
  • action.method: GET or POST. The HTTP request method that you should use. After the shopper completes the payment, they will be redirected back to your returnURL using the same method.
    The redirect method depends on your payment method configuration and the length of the data included in the request, so make sure that your integration can handle both HTTP GET and HTTP POST methods.

To verify the payment result in the next step, you also need the following from the /payments response:

  • action.paymentData: The paymentData value that you send in your /payments/details request.
  • details: Array of parameters that you need to send in your /payments/details request. For example, payload or redirectResult.
    The parameters can vary based on the payment method configuration. Make sure to check the details array to confirm the parameters that you need to send in your next API request.
/payments response
{
    "resultCode": "RedirectShopper",
    "action": {
        "method": "GET",
        "paymentData": "Ab02b4c0!BQABAgBlmvU6H9LnijLzrYAgMfopoX...",
        "paymentMethodType": "grabpay_SG",
        "type": "redirect",
        "url": "https://test.adyen.com/hpp/skipDetails.shtml?brandCode=grabpay_SG&currencyCode=SGD..."
    },
    "details": [
        {
            "key": "payload",
            "type": "text"
        }
    ],
    "paymentData": "Ab02b4c0!BQABAgBlmvU6H9LnijLzrYAgMfopoX...",
    "redirect": {
        "method": "GET",
        "url": "https://test.adyen.com/hpp/skipDetails.shtml?brandCode=grabpay_SG&currencyCode=SGD..."
    }
}

Handle the redirect

To complete a GrabPay payment, you need to redirect the shopper to GrabPay.

  1. To complete the payment, redirect the shopper to the action.url returned in the /payments response.
  2. After the shopper is redirected back to your website or app, check the payment result by making a /payments/details request, specifying:
    • paymentData: Value you received in the /payments response.
    • details: Object that contains the URL-decoded values of the parameters that were returned when the shopper was redirected back to your website or app. For example, payload. To check the parameters that you should submit, refer to the details array that you received in the /payments response.
    /payments/details request
    {
         "paymentData":"Ab02b4c0!BQABAgCJN1wRZuGJmq8dMncmypvknj9s7l5Tj...",
         "details":{
           "{hint:Verify the parameters from /payments response}payload{/hint}":"Ab02b4c0!BQABAgCW5sxB4e/=="
         }
    }
    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"
     }

For more information and detailed instructions, refer to Handling redirects.

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 GrabPay are:

resultCode Description Action
Authorised The payment was authorised. You will receive the funds in a number of days. Inform the shopper that the payment was successful.
Cancelled The shopper cancelled the payment before it was completed, for example while in the GrabPay app. Ask the shopper whether they want to continue with the order, or ask them to select a different payment method.
Refused The payment was refused by the shopper's card issuer. Ask the shopper to try the payment again using a different payment method or card.
Pending The shopper has completed the payment but the final result is not yet known. You will receive the final result of the payment in an AUTHORISATION notification. Inform the shopper that you've received their order, and are waiting for the payment to be processed.
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 processed.
If a shopper completed the payment but failed to return to your website or app, you will receive the outcome of the payment in an AUTHORISATION notification.

Recurring payments

To make recurring GrabPay payments:

  1. In your initial payment request, create a shopper token specifying:
    • storePaymentMethod: true
    • shopperReference: Your unique identifier for the shopper.
    • shopperInteraction: Ecommerce
  2. When you make a /payments/details request after the shopper is redirected back to your website or app, save the recurringDetailReference that you receive in the additionalData of the response. This is your token.
  3. Make subsequent recurring transactions specifying a paymentMethod with:
    • type: The GrabPay type, for example grabpay_SG.
    • recurringDetailReference: The token you received in the /payments/details response.

Refer to Tokenization for more information and detailed instructions.

Test and go live

To test your GrabPay integration:

  1. Contact Grab and register a local phone number and an email address with them for GrabPay. The local phone number needs to be in the country that you want to test GrabPay payments for. For example, to test grabpay_SG you need a Singapore phone number.
  2. In the simulator, log in to Grab with the phone number you registered, and specify the one-time password you receive on that phone number.

Check the status of the GrabPay test payments in your Customer Area > Transactions > Payments.

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

See also