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The Suby Sandbox mirrors the full production experience. Create products, simulate card and crypto payments, and verify webhooks, all in a safe testing environment.
Sandboxdashboard

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Create a test product

You can create a product in sandbox mode using any of these methods:

Product Link

Create a product from the dashboard, no code required. Generate a PayLink and share it to test the full checkout flow.

API

Programmatically create products, checkout sessions, and manage subscriptions via the Suby API.

Sandbox API

Use the sandbox base URL to test the full API lifecycle without side effects.

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Simulate a payment

Once your product is created, open the generated checkout link to run a test payment: 
https://checkout.suby.fi/p/pro_nh5ts1yir4hva744jpvln1ek
Paylinksandbox
You can pay with a test card or with crypto on Base Sepolia testnet.
Use these test card numbers at checkout to simulate different outcomes. Any future expiration date, any CVC, any billing address.
Card numberResult
4242 4242 4242 4242Success
4000 0000 0000 0002Declined
4000 0000 0000 9995Insufficient funds
Any other card number will be declined.

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Verify the payment

After completing a test payment, head to your dashboard to check the transaction status, inspect webhook deliveries, and confirm that your integration works as expected.
You can also listen for sandbox webhooks to test your backend logic. Webhook events in sandbox mode are identical to production.

API reference

Endpoints, authentication, and webhooks.

PayLinks

Generate and share checkout links.