Testing

Test your integration with simulated transactions and webhooks.

Once integrated, you can test using sample test cards found below and simulate different outcomes eg. successful or failed payment in a sandbox environment.

Test cards act as fake credit cards, and allow you to simulate the following scenarios:

  • Successful payments by card brand
  • Card errors due to declines, fraud, or invalid data
  • Authentication with 3D Secure
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Breeze offers both fiat (card) and crypto (non-card) payment options, along with Apple Pay and Google Pay wallets. However, the guide below is for testing card payments.

To use the test cards, manually enter the card info as follows:

  • The card number listed in the table and the response code you want to test
  • Any valid three-digit card verification value (CVV) for Visa and Mastercard cards, or four-digit CVV for American Express cards
  • Any future card expiry date, in the format MM/YY or MM/YYYY

Default (non-3DS) cards and responses

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If the test card returns a failed payment response, the end user is presented with the following error message: "Payment failed. Please check your card details and balance, or try another card. If the issue persists, contact your bank or support."

Card typeCard numberResponseCountry code
Credit4000020000000000SuccessUS
Credit4242424242424242SuccessGB
Credit4242424242424242FailedGB
Credit4539467987109256FailedES
Credit4024007181869214FailedUS
Credit4916301720257093FailedUS
Credit4485899805156040FailedUS
Debit4659105569051157SuccessGB
Debit4095254802642505FailedUS
Prepaid4000148147058142Failed

3D Secure cards and responses

Use these test cards to simulate different 3D Secure (3DS) authentication flows and results.

You can use:

  • Any valid three-digit CVV for Visa and Mastercard, or four-digit CVV for American Express
  • Any future expiry date, in the format MM/YY or MM/YYYY

If your 3DS authentication test is challenged, and you're redirected to the 3DS simulator page, enter the password Checkout1!.

3DS2 Challenge Flow

Card schemeCard typeCard numberCountry code
American ExpressCredit372688581899681US
Cartes Bancaires or MastercardCredit5137210000000158FR
Cartes Bancaires or VisaDebit4010061700000021FR
MastercardCredit5385308360135181US
UnionPay InternationalDebit6224120000000003CN
VisaCredit4242424242424242GB

Cards for testing Payouts (Push-To-Card)

Response codeCard numberCountry code
100004921817844445119UK
4978313915783283FR
4076613139850359SG
4024764449971519US
200054818192525595285UK
4558473893020179FR
4811553373235190SG
4610179846730147US
200574818192160565981UK
4975992266555193FR
4815649658513826SG
4610174464118832US