MockCard

Stripe payment health check

Go beyond a single webhook ping — test declines, 3DS redirects, and signed events in one toolkit.

Run free webhook checkBrowse all test cards

Webhook + payment flow = full health check

A Stripe health check isn't complete if you only verify connectivity. You need confidence that declines update order state, 3DS abandonment doesn't leave carts stuck, and duplicate events don't double-charge. MockCard combines a webhook audit with programmatic test cards and chaos scenarios.

Stripe sandbox gaps

Stripe test mode covers many card numbers but not duplicate webhook delivery, limbo states, or controlled latency storms. MockCard targets those production failure modes with simulate_race, limbo, and latency scenarios on Pro plans.

Recommended workflow

1) Run the webhook health check below. 2) Generate Stripe-shaped cards for insufficient_funds and 3ds_challenge. 3) Add MockCard to CI so regressions fail the build. 4) Upgrade to Pro when you need race and delivery logs.

Webhook Health Check

See how your payment handler holds up against real failure scenarios — free, no signup

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Fires 5 probes · ~5 seconds · no account required

Frequently asked questions

Is this a replacement for Stripe test mode?
It's complementary — use Stripe for live-mode parity, MockCard for deterministic edge cases and CI.
Works with Connect?
Webhook probes work on any HTTPS endpoint. Connect-specific flows may need custom metadata in API requests.

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