Sandbox is a built-in test processor. It is a simulated gateway, not a connection to a real payment service provider, so no funds ever move and no live merchant account is required. Use it to build and test end-to-end payment flows — authorisations, captures, refunds, voids, 3D Secure, and saved payment methods — against deterministic test data before connecting a production payment provider. Sandbox needs no credentials and has no external onboarding step: you choose what it emulates with toggles in its connection settings.
At a glance
Section titled “At a glance”| Type | Gateway |
| Connection | No credentials (settings toggles only) |
Where it operates
Section titled “Where it operates”Sandbox is a test processor and is not tied to any acquiring region, so merchants can onboard it in every supported country.
Payment methods
Section titled “Payment methods”Sandbox simulates each payment method with fixed test credentials rather than contacting a real network, so every result is deterministic and repeatable. Each method is enabled independently in the connection settings (at least one must be enabled). Our integration supports:
- Cards: Visa, Mastercard, American Express, Discover, Diners Club, JCB, and UnionPay. Dedicated test card numbers drive specific outcomes — successful authorisation, insufficient funds, stolen/seize card, invalid CVC, rate-limit, 3D Secure required, refund declined, and delayed processing.
- Bank debits: ACH (USD) and SEPA (EUR), each with test routing/account numbers or IBANs that simulate success, account closed, insufficient funds, unauthorised debit, and other decline scenarios.
- Hosted payments: a simulated hosted-payment flow for testing redirect and off-session token capture.
The gateway also exposes developer-mode options for testing edge cases, including pending/settlement delays, required-field enforcement (CVC, AVS, account name, email, phone, line items), a 3DS challenge window, and disabling network tokenisation or card saving. Network tokenisation, which Apple Pay and Google Pay use, is on unless you disable it.
Setting up Sandbox
Section titled “Setting up Sandbox”See Connecting Sandbox for adding it and what each setting does, and Sandbox test cards for the card and bank details that give each result.