Use staging, Test Shop, and Test Center to rehearse the full lifecycle.

Test Shop is a non-production browser harness for checkout testing. It is useful for non-developer stakeholders and for verifying webhook delivery without wiring a complete storefront first.

• Log in to staging or test as a merchant.
• Open Test Shop from the portal.
• Create or select the built-in webhook capture endpoint.
• Use a staging/test secret key only.
• Create a checkout and open the hosted checkout URL.
• Refresh payment and webhook status until the event arrives.
• After completion, try a merchant-session refund if needed.

Test Center is for owner/admin users in non-production environments. It helps your team rehearse operational outcomes before live traffic.

• Send sample signed webhook events to subscribed endpoints.
• Send sample encrypted webhook events and verify your receiver can decrypt them with the one-time private key.
• Create sandbox chargebacks on completed test payments.
• Generate sample settlement and reconciliation outcomes for test payments.
• Move staging payout requests through sample outcomes without Alpha support.
• Jump directly to payments, webhooks, settlements, chargebacks, payouts, and Test Shop.

Sandbox testing should reinforce practical merchant expectations: hosted checkout sessions expire, sandbox responses should mimic production errors, asynchronous payment methods rely on webhook-style notifications, and payout success can be asynchronous rather than immediate. Merchants should build for pending, retry, expiry, and asynchronous final confirmation.

• Checkout sessions can expire; create a fresh payment if the buyer misses the window.
• Some payment methods stay pending until a final notification arrives.
• Payout API acceptance is not the same as delivered funds; wait for Alpha payout status.
• Sandbox credentials and test payment details are not production approval.

• Use the checkout URL returned by the staging or test payment API.
• Verify the buyer can complete, cancel, abandon, or retry checkout without your order system fulfilling too early.
• Confirm your webhook receiver handles pending, completed, failed, expired, refunded, and disputed states.
• Keep real customer payment details, production customer PII, and live beneficiary credentials out of sandbox tools.