The card test environment v4 is a sandboxed workspace where developers and QA teams simulate card transactions without ever touching a live payment network. It ships with preloaded test card profiles, deterministic response codes, and a webhook log, so you can build, break, and debug a checkout flow long before anything reaches production. Version 4 focuses on faster provisioning, cleaner transaction replay, and a more predictable API surface than earlier releases.
Key Features
- Ready-made test card profiles covering approvals, declines, chargebacks, and 3-D Secure challenges
- Deterministic response codes, so the same input always returns the same result
- Instant sandbox provisioning with isolated API keys per project or team member
- Transaction replay plus simulation of partial captures, refunds, and reversals
- Webhook inspector with retry controls and full request and response logs
- One-click environment reset that clears test data without wiping your configuration
- Works with common server SDKs through REST, GraphQL, and command-line workflows
Materials and Specifications
This environment uses only synthetic card identifiers that pass standard validation checks, so no real account data is required or stored. Test keys are scoped separately from live keys, sessions run over TLS, and request logs are configurable for retention between seven and ninety days. The v4 API keeps the same endpoint structure as earlier versions with additive fields only, so existing integrations usually migrate with a key swap and a version header change.
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Shipping and Returns
Access is delivered digitally: after checkout you receive provisioning credentials and setup instructions by email, typically within minutes. Nothing physical ships, so there is no handling or transit time. If the environment has not been activated on your account, the standard return window applies and support can help with migration or key issues at any time.
Is it safe to use real card numbers in the sandbox?
No. The sandbox is designed for the supplied synthetic test profiles only, and using live account data there may violate your processing agreement.
Does v4 work with integrations built for earlier versions?
Yes. The endpoint structure is unchanged and new fields are optional, so most teams migrate by switching keys and updating the version header.
Can I reset my test data at any time?
Yes. The reset control clears transactions, customers, and webhook history while leaving your keys, settings, and team access intact.