Checkout, login, onboarding, and billing are high-stakes flows. Zerocheck runs approved browser tests for those flows and records what happened, while payment and email-provider helpers remain customer-authored in V1.
“I deployed a new checkout flow on Friday afternoon at 4:47 PM. After 6 minutes Slack exploded. Payment processing broke and customers couldn't complete purchases.”
DEV Communitysource
“I tried to buy your product three times. Your site kept failing. I went to your competitor instead.”
Optivem Journalsource
Average payment incident costs $12K+ in failed transactions
Stripe iframe testing is a universal pain point: Cypress can't handle cross-domain iframes
95%+ of companies skip magic link testing in CI entirely
Checkout flows often involve third-party services, redirects, and test-mode sandboxes. V1 should be framed around approved checkout and billing smoke tests, with deeper provider automation handled by customer-authored flows.
Email flows sit in a structural tooling gap. E2E tools can drive browsers but can't receive email. Email tools can receive email but can't drive browsers. Integration requires 2-4 hours of plumbing per project. Nobody does it.
No testing tool claims 'checkout testing' or 'email flow testing' as a category. These are the highest-stakes flows, and they're universally the least tested.
Stripe ships a new Elements SDK version. Developer updates the package. Unit tests pass because Stripe is mocked. No E2E checkout test exists. Deployed Friday evening. Monday morning: 3% of payments failing. 3DS modal renders but the callback is broken. $12K in failed transactions before rollback.
Same checkout update. Zerocheck runs approved checkout and billing smoke tests on the PR. A blocking approved failure stops the merge, with screenshots, recording, and step trace for the engineer reviewing the change.
Author and approve safe checkout and billing smoke tests
Use customer-authored login setup for authenticated flows
Safe customer-authored payment-adjacent flows supported
Revenue math in the PR comment: what this test protects
Other tools prove their own platform is secure. Zerocheck produces JSON evidence from your executed application tests.
Get coverage on the flows customers will notice when they break, without turning testing into a quarter-long infrastructure project.
Guard the only code path where a bug is measured in lost dollars per minute.
V1 does not ship built-in Stripe or 3DS helpers. Teams can author approved tests for safe payment-adjacent browser flows, while generated tests avoid payment fields and final purchase actions.
Do not give Zerocheck real payment data. Use safe staging/test environments and customer-authored flows for payment-adjacent coverage.
Built-in SMTP capture is not available in V1. Use customer-authored login setup, environment variables, or your own test inbox tooling for magic-link flows.
Zerocheck can run approved browser tests for safe, customer-authored flows. Generated and discovery tests avoid payment fields and final purchase actions.
Protect the flows that generate your revenue. Checkout, payments, onboarding, and email tested on every PR.
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