Test Cards

Test card numbers for simulating different payment outcomes in sandbox

Overview

Use these test card numbers in the Yuno sandbox environment to simulate various payment outcomes. These cards work with any expiry date in the future and any 3-digit CVV.

Test cards only work in the sandbox environment (api-sandbox.y.uno). Never use real card numbers in sandbox or test card numbers in production.

Test Card Numbers

Successful Payments

Card Number	Brand	Result	Description
4111111111111111	Visa	Approved	Standard successful payment
5500000000000004	Mastercard	Approved	Standard successful payment
378282246310005	Amex	Approved	American Express approved
6011111111111117	Discover	Approved	Discover approved

Declined Payments

Card Number	Brand	Result	Decline Reason
4000000000000002	Visa	Declined	Generic decline
4000000000000069	Visa	Declined	Expired card
4000000000000127	Visa	Declined	Incorrect CVV
4000000000009995	Visa	Declined	Insufficient funds
4000000000000119	Visa	Declined	Processing error

3DS Authentication

Card Number	Brand	Result	3DS Behavior
4000000000003220	Visa	3DS Required	Full 3DS challenge flow
4000000000003063	Visa	3DS Frictionless	3DS passes without challenge
4000000000003097	Visa	3DS Failed	3DS authentication fails

Special Scenarios

Card Number	Brand	Result	Scenario
4000000000000259	Visa	Pending	Async payment processing
4000000000003436	Visa	Requires Action	Redirect required

Test Card Details

For all test cards, use:

Field	Value
Expiry Month	Any future month (e.g., 12)
Expiry Year	Any future year (e.g., 2028)
CVV	Any 3 digits (e.g., 123), 4 digits for Amex
Cardholder Name	Any name (e.g., Test User)

Test Customer Data

Use these values for customer fields in sandbox:

{
  "customer": {
    "email": "[e-mail]",
    "first_name": "Test",
    "last_name": "User",
    "document": {
      "document_type": "CPF",
      "document_number": "12345678901"
    },
    "phone": {
      "country_code": "55",
      "number": "11999999999"
    }
  }
}

Document validation is relaxed in sandbox. The CPF number 12345678901 is accepted for testing purposes even though it is not a valid CPF.

Usage Example

const payment = await fetch('https://api-sandbox.y.uno/v1/payments', {
  method: 'POST',
  headers: { /* sandbox auth headers */ },
  body: JSON.stringify({
    checkout_session: 'session-id',
    payment_method: {
      type: 'CARD',
      token: tokenFromTestCard,  // Token created with 4111111111111111
    },
    amount: { currency: 'USD', value: 10.00 },
    country: 'CO',
  }),
});
// Expected: 200 with status "SUCCEEDED"