How to Test Stripe Checkout & 3D Secure in React Without Real API Keys
Learn how to simulate Stripe PaymentIntents, 3D Secure verification, test credit cards, refunds, and webhook triggers using Playground API.
How to Test Stripe Checkout & 3D Secure in React Without Real API Keys
Integrating online payments (Stripe, PayPal, LemonSqueezy) into a frontend application is one of the most critical flows in ecommerce and SaaS.
However, testing payment forms during early frontend prototyping is painful:
- You need a live Stripe test mode account and secret API keys.
- Handling test card numbers (declines, insufficient funds, 3DS authentication challenges) requires navigating third-party dashboards.
- Testing post-payment webhook fulfillment requires running local webhooks proxies.
Playground API provides a complete Mock Payment Gateway & Checkout Simulation with full Stripe API parity!
1. Creating a Payment Intent
Create payment intents via POST /api/v1/payments/intents:
2. Deterministic Test Card Numbers
Playground API supports standard deterministic test cards:
- Success Card:
4242 4242 4242 4242-> Status:succeeded - 3D Secure Challenge:
4000 0000 0000 3020-> Status:requires_action(triggers 3DS modal) - Declined Card:
4000 0000 0000 0002-> Status:402 Payment Required(card_declined) - Insufficient Funds:
4000 0000 0000 9995-> Status:402 Payment Required(insufficient_funds)
3. Automatic Webhook Triggers
Confirming a payment intent automatically triggers a signed payment_intent.succeeded webhook to any registered endpoints in your session!
4. Interactive Payments Studio
Test payment modals, 3DS challenges, and refund flows directly inside the documentation:
š https://playground.nileslabs.com/docs/payments
Conclusion
Build high-converting checkout flows with confidence. Test payments with Playground API today!
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