generated: '2026-07-18'
method: searched
source: https://docs.coinflow.cash/guides/checkout/testing/testing-credit-cards
description: >-
  Coinflow sandbox environment and published test values. All values below are
  copied verbatim from the Coinflow testing docs; none are invented. The sandbox
  is a fully separate environment reached at the sandbox base URL; swap
  sandbox.coinflow.cash for coinflow.cash to move to production.
environments:
  sandbox_api_base: https://api-sandbox.coinflow.cash/api
  sandbox_web_host: sandbox.coinflow.cash
  production_web_host: coinflow.cash
  session_key_ttl: 24 hours
notes:
  - The pre-built UI SDK handles card capture, PCI-compliant tokenization, 3DS challenges, and fraud signals.
  - A sandbox merchant account + API keys are provisioned from the Coinflow dashboard (Account Setup).
test_cards:
  - number: '4242424242424242'
    brand: Visa
    cvv: '123'
    outcome: Approval for any zipcode; decline when billing zipcode is 99999
  - number: '5555555555554444'
    brand: Mastercard
    cvv: '123'
    outcome: Approval for any zipcode; decline when billing zipcode is 99999
  - number: '6011010000000003'
    brand: Discover
    cvv: '123'
    outcome: Approval for any zipcode; decline when billing zipcode is 99999
  - number: '378282246310005'
    brand: American Express
    cvv: '1234'
    outcome: Approval for any zipcode; decline when billing zipcode is 99999
special_zipcodes:
  - zipcode: '99999'
    effect: Card decline
  - zipcode: '00000'
    effect: Chargeback protection rejection
  - zipcode: '00001'
    effect: Fraud protection rejection
test_cards_3ds:
  - number: '5204247750001471'
    brand: Mastercard
    cvv: '123'
    exp: 08/27
    scenario: Frictionless
  - number: '4000020000000000'
    brand: Visa
    cvv: '123'
    exp: 08/27
    scenario: Friction challenge
  - number: '4055011111111111'
    brand: Visa
    cvv: '123'
    exp: 08/27
    scenario: Friction challenge failure
  - number: '4264281511112228'
    brand: Visa
    cvv: '123'
    exp: 08/27
    scenario: Rejection
  - number: '2303779951000396'
    brand: Mastercard
    cvv: '123'
    exp: 08/26
    scenario: Frictionless
  - number: '2303779951000446'
    brand: Mastercard
    cvv: '123'
    exp: 08/26
    scenario: Friction challenge
  - number: '2303779951000453'
    brand: Mastercard
    cvv: '123'
    exp: 08/26
    scenario: Friction challenge failure
  - number: '2303779951000347'
    brand: Mastercard
    cvv: '123'
    exp: 08/26
    scenario: Rejection
amount_based_3ds_triggers:
  - subtotal_ending: '.98'
    effect: Friction challenge success
  - subtotal_ending: '.97'
    effect: Friction challenge failure
  - subtotal_ending: '.96'
    effect: Rejection
  - subtotal_ending: any other amount
    effect: Frictionless challenge
two_factor_challenge:
  success_code: '1234'
  note: Enter 1234 to pass the friction challenge; any other value simulates rejection.
additional_testing_docs:
  - https://docs.coinflow.cash/guides/checkout/testing/testing-ach
  - https://docs.coinflow.cash/guides/checkout/testing/testing-sepa
  - https://docs.coinflow.cash/guides/payouts/testing-sandbox/testing-withdraws