generated: '2026-07-24'
method: searched
source: https://devdocs.helcim.com/docs/test-credit-card-numbers + /docs/testing-declines-and-avs + /docs/developer-testing
test_mode:
  note: Requires a dedicated developer test account. Test cards on a production account/terminal are declined
    by card networks and may incur charges.
  test_host: https://api.helcim.test/v2
  setup_docs: https://devdocs.helcim.com/docs/developer-testing
test_cards:
- brand: Mastercard
  number: '5413330089099130'
  expiry: 01/28
  cvv: '100'
- brand: Mastercard
  number: '5413330089020011'
  expiry: 01/28
  cvv: '100'
- brand: Visa
  number: '4124939999999990'
  expiry: 01/28
  cvv: '100'
- brand: Visa
  number: '4000000000000028'
  expiry: 01/28
  cvv: '100'
- brand: American Express
  number: '374245001751006'
  expiry: 01/28
  cvv: '1000'
- brand: Discover
  number: '6011973700000005'
  expiry: 01/28
  cvv: '100'
- brand: Discover
  number: '6011450103333333'
  expiry: 01/28
  cvv: '100'
decline_simulation:
  mechanism: Submit cardCVV of 200+ to force the mapped decline; 100-104 return approvals with a specific
    CVV response code.
  reference: errors/helcim-decline-codes.yml
recommended_flow: Tokenize test cards via HelcimPay.js, then send the card token to the Purchase endpoint
  to mirror production.