WonderTwin for Stripe.

WonderTwin Pro for Stripe

Powered by the commercial runtime.

Production-fidelity Stripe twin — simulate Stripe with real rate limits, real fraud responses, deterministic replay.

$ wt up stripe --pro

Pro · drift-aligned · last calibrated 2h ago

• Production-fidelity rate limits

  (real Stripe limits, not 4× stricter test-mode)

• Stripe Radar fraud responses

  (real production behavior, locally)

• Deterministic replay

  (same seed → byte-identical run, every time)

Here's what this twin handles

• ✓ Charges + customer state machine
• ✓ Subscription lifecycle (trial → active → past_due → canceled)
• ✓ Webhook delivery semantics (signing, retry envelope, ordering)
• ✓ Idempotency keys
• ✓ Test card semantics (4242, 4000 declines, 3DS challenges)
• ✓ Connect platform (read-only multi-party)
• ✓ Radar fraud signals (Pro-only)
• ✓ Production-fidelity rate limits

Not yet supported (and why)

• · Stripe Tax — planned Q3 · tell us if you need it
• · Treasury / banking-as-a-service — low demand · tell us if you need it
• · Issuing (card issuance) — infeasible without vendor partnership
• · Identity verification — planned Q4

wondertwin-stripe

Free · MIT

Powered by the community runtime. Built for the community, always for the community.

Local Stripe environment for AI agents — develop against Stripe behavior without burning sandbox credits.

$ npx wondertwin init stripe

Shipped 4/30 · ⭐ N on GitHub · MIT

Use cases

• Build subscription billing flows that span Stripe + Plaid in one local environment
• Validate webhook handlers against Stripe's real delivery semantics — locally, no ngrok
• Reproduce production Stripe state in CI runs — same seed, same flow, every time

Here's what this twin handles

• ✓ Charges + customer state machine
• ✓ Subscription lifecycle
• ✓ Webhook delivery semantics
• ✓ Idempotency keys
• ✓ Test card semantics (4242, 4000 declines)

Not yet supported (and why)

• · Radar fraud responses — Pro-only
• · Production-fidelity rate limits — Pro-only
• · Stripe Tax — planned · tell us if you need it
• · 3DS challenge flows — Pro-only