GrabPay via Adyen

Accept GrabPay payments from customers in Singapore and Malaysia with Adyen as the payment service provider (PSP). The customer selects GrabPay, confirms the payment in GrabPay or the Grab app, and returns to your site.

Supported workflows

Before you begin

Complete these steps before you send your first GrabPay payment through Adyen:

Set up an Adyen integration in your workspace. Follow the Adyen integration setup guide if you don’t have one yet.
Ask Adyen to enable GrabPay for Singapore, Malaysia, or both on your Adyen merchant account.
Configure Adyen webhook notifications for your integration.
In the Payrails Portal, go to Settings → Integrations, open your Adyen integration, select GrabPay under Payment methods, and save.
Add GrabPay as a payment option in your workflow.

Request fields for Adyen

Send these fields in the authorize request, in addition to the standard authorize fields. Required fields must be present for the payment to succeed. Payrails sends Optional fields to the PSP when you include them.

Field	Status	Description
`amount.currency`	Required	`SGD` for customers in Singapore or `MYR` for customers in Malaysia. Payrails rejects other currencies.
`merchantReference`	Required	Up to 32 characters, using only letters, digits, `_` and `-`. Payrails sends it to Adyen unchanged as the payment reference, and checks the same format on refunds.
`meta.customer.email`	Optional	Sent to Adyen as the shopper email.
`meta.customer.name`, `meta.customer.lastName`	Optional	Sent to Adyen as the shopper name.
`meta.customer.country.code`	Optional	Sent to Adyen as the country code, for example `SG`.
`meta.order.softDescriptor`	Optional	Shown on the customer’s bank statement.
`meta.order.lines`	Optional	Sent to Adyen as line items.

Authorize a GrabPay payment

Call authorize a payment with grabPay as the paymentMethodCode. The response includes the redirect to GrabPay.

Authorize request

{
  "merchantReference": "order-10045",
  "amount": {
    "value": "80.00",
    "currency": "MYR"
  },
  "paymentComposition": [
    {
      "integrationType": "api",
      "paymentMethodCode": "grabPay",
      "amount": {
        "value": "80.00",
        "currency": "MYR"
      }
    }
  ],
  "meta": {
    "customer": {
      "email": "aisyah.rahman@example.com",
      "country": {
        "code": "MY"
      }
    }
  },
  "returnInfo": {
    "success": "https://example.com/success",
    "error": "https://example.com/error"
  }
}

After the customer confirms the payment, GrabPay returns them to your success or error URL. Confirm the result through webhook notifications or the execution status before you fulfill the order.

How Adyen handles GrabPay

Payrails picks the Adyen GrabPay variant from the currency: Singapore for SGD and Malaysia for MYR.
Payrails checks the merchant reference format before it calls Adyen, and returns an error that names the rule when the reference doesn’t match.
On mobile, open the redirect in the default browser or an in-app browser tab, not a web view, so the customer can switch to the Grab app.
Adyen captures GrabPay payments automatically. When Adyen confirms the authorization, Payrails also records the capture, so the payment completes in one step.
GrabPay through Adyen supports customer-initiated payments only. Payrails rejects an MIT before it calls Adyen.

Getting Started

Payment Orchestration

Token Vault

Analytics & Reporting

Fraud Management

Chargebacks

Monitoring

Resources

Use Cases

Supported workflows

Before you begin

Request fields for Adyen

Authorize a GrabPay payment

How Adyen handles GrabPay

​Supported workflows

​Before you begin

​Request fields for Adyen

​Authorize a GrabPay payment

​How Adyen handles GrabPay

Supported workflows

Before you begin

Request fields for Adyen

Authorize a GrabPay payment

How Adyen handles GrabPay