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All failure scenarios
Protection example
REVENUE CRITICAL
7 checks

Know the payment flow works before the change ships.

Billing appears healthy until the actual payment or subscription flow breaks.

Protect a flow like thisHow Endia verifies flows

The problem

Billing appears healthy until the actual payment or subscription flow breaks.

When this breaks after deploy, the cost shows up as lost revenue, locked-out users, support load, or silent data mistakes — not as a red unit test in CI.

What can break

  • checkout never starts
  • test payment dead-ends
  • success return never lands
  • subscription state missing after success
  • cancel path unavailable

The critical flow

  1. 1checkout start
  2. 2test payment
  3. 3success return
  4. 4subscription/customer state (fixture)
  5. 5cancel path (fixture)

What Endia checks

  • Checkout start

    Test-mode checkout UI opens from the pricing CTA

  • Test mode labeled

    UI clearly indicates Stripe test mode (no live charges)

  • Test payment completes

    Test card path reaches a success handoff

  • Success return

    Return view shows paid/active subscription state

  • Customer/subscription state

    Fixture shows an active plan after success

  • Cancel path

    Cancel control moves plan to canceled in the fixture

  • No secret leakage in UI

    Page never displays sk_live / secret key material

What a pass means
SAFE TO MERGE — test-mode checkout → success return → subscription state still completes.
What a failure looks like
REGRESSION DETECTED — checkout start fails, success return missing, or subscription state wrong after test pay.

What evidence you get

Screenshots of billing UI states, step trace through payment handoff, the release check result on the PR.

screenshots
step trace
release check

How it fits the Vercel preview gate

Run the recorded Stripe test-mode journey on every preview that touches billing UI.

Try the protected flow (controlled fixture)

Neutral demonstration fixture — not a customer app, not live production data. Walk the flow Endia would record and replay on a Vercel preview.

Stripe test-mode billing
Demonstration data
Stripe test mode

Pro plan — $29/mo

TEST MODE ONLY. No live cards. No Stripe secrets in the page.

Known limitations

  • Demonstration only — no live Stripe API keys, no real charges.
  • Uses Stripe test-card conventions for illustration; secrets never leave the server env.
  • Refund scenario is not fully modeled; cancel path is the supported fixture.

Protect a flow like this

Sign in to record your critical journey and run it on every Vercel preview.

Protect a flow like this