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Use test mode to develop and test your integration without processing real payments.

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Test vs Live Mode

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Test Card Numbers

Use these card numbers in test mode:

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Successful Payments

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Decline Scenarios

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3D Secure Testing

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Test Expiry and CVC

  • Expiry: Any future date (e.g., 12/25)
  • CVC: Any 3 digits (4 digits for Amex)
  • ZIP: Any 5 digits

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Simulating Webhooks

Use the Atlas CLI to trigger test webhooks:
Or use the Dashboard to send test webhook events to your endpoint.

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Test Bank Accounts (ACH)

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Going Live Checklist

Before switching to live mode:
  • Test successful payments with multiple card brands
  • Test declined payments and error handling
  • Verify webhook signature validation
  • Test 3D Secure flows
  • Confirm refund handling works
  • Review error messages shown to customers
  • Set up monitoring and alerts
  • Configure live webhook endpoints