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Tap to add your card for Payment Sheet Private preview

Allow customers to add their card by tapping their card on their device.

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Note

The tap to add your card feature is available on Android only.

The tap to add your card feature for Payment Sheet lets customers add a card to your app by tapping a physical card on a compatible NFC-equipped Android device. This reduces manual card entry and friction at checkout while maintaining secure card-present authentication. After the tap, customers can save their card for future purchases and optionally enroll in Link. You can use this feature in your existing Payment Sheet integration to save cards for future payments.

This guide describes how you can allow customers to tap to add their card through your in-app payment integration.

Before you begin

1. Create a Stripe account or sign in .
2. Follow the steps in Accept in-app payments to integrate with the Payment Sheet .
3. Order a physical test card to try tapping to add your card in test mode.

Initialize the Terminal SDK

To allow customers to tap to add their card in a Payment Sheet, add the following Stripe Terminal dependencies to your project:

build.gradle.kts

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dependencies {
 // ...

 // Stripe Terminal SDK
 implementation("com.stripe:stripeterminal-core:5.4.1")
 implementation("com.stripe:stripeterminal-taptopay:5.4.1")
}

The tap to add your card feature uses the Terminal Tap to Pay infrastructure to operate in a dedicated process, making transactions more secure. In this process, we create a second instance of your Application. To avoid unexpected errors from running your code in this process, you can skip initialization in your Application by checking TapToPay.isInTapToPayProcess(). Learn more about the Tap to Pay infrastructure.

// Substitute with your application name, and remember to keep it
// the same as your AndroidManifest.xml
class StripeApplication : Application() {
 override fun onCreate() {
 super.onCreate()

 // Skip initialization if running in the TTPA process.
 if (TapToPay.isInTapToPayProcess()) return

 // For example, this will be skipped.
 TerminalApplicationDelegate.onCreate(this)
 }
}

Add an endpoint

This integration uses the following Stripe API objects:

• A SetupIntent is an object that represents your intent to set up a customer’s payment method for future payments. The payment methods that customers see during the checkout process are also included on the SetupIntent. You can let Stripe automatically pull payment methods from your Dashboard settings or you can list them manually.
• A Customer is an object that you use to set up future payments by attaching a payment method to it. Create a Customer object when your customer creates an account with your business. If your customer is making a payment as a guest, you can create a Customer object before payment and associate it with your own internal representation of the customer’s account later.

For security reasons, your app can’t create these objects. Instead, add an endpoint on your server that:

• Retrieves the Customer
• Creates a SetupIntent with a card _ present payment method type and the Customer ID. If the SetupIntent doesn’t have a payment method type of card _ present , the tapped card won’t be saved on the customer’s account.
• Returns the SetupIntent client secret to your app.

// This example sets up an endpoint using the Express framework.
const stripe = require('stripe')('{{SANDBOX-API-KEY}}');

app.post('/create-card-present-setup-intent', async (req, res) => {
 const setupIntent = await stripe.setupIntents.create({
 // Use an existing customer ID
 customer: req.customer.id,
 payment_method_types: ['card_present'],
 });

 res.json({
 setupIntent: setupIntent.client_secret,
 })
});

Implement your setup intent creation callback

To allow customers to tap to add their card in a Payment Sheet, you must implement a SetupIntent creation callback for tap to add using createCardPresentSetupIntentCallback.

After your customer taps their card, we attach the payment method to the SetupIntent created from your implementation and save the card for future use.

val paymentSheet = PaymentSheet.Builder { result ->
 // Handle payment sheet result
}
 .createCardPresentSetupIntent {
 val response = server.createCardPresentSetupIntent(customerId)

 return if (response.isSuccess) {
 Result.success(response.body!!.clientSecret)
 } else {
 Result.failure(response.exception)
 }
 }
 .build()

Test your integration

You can test tapping to add your card by using a device supported by the Tap to Pay infrastructure.

• To use the simulated reader , use a sandbox API key and a debuggable build of your application.
• To use the real NFC reader, use a production build of your application with physical test cards to tap on your device.

Optional Additional features