---
title: Sample cards for testing: COS Card Payments
slug: apis/webhooks/cos-card-payments/sample-cards-for-testing-cos-card-payments
description: Utilize provided test card numbers for sandbox environment testing of card transactions.
docTags: 
createdAt: 2025-08-17T06:14:32.901Z
---

Cross River provides you with these test cards for use in our [sandbox](docId\:YDqX1Hwsn_f6TZ4tdMY0t). 

| Mastercard (Debit) | VISA OCT (Prepaid) | VISA OCT(Debit)  |
| ------------------ | ------------------ | ---------------- |
| 5102589999999905   | 4000289999999908   | 4007589999999904 |
| 5102589999999913   | 4000289999999916   | 4007589999999912 |
| 5102589999999921   | 4000289999999924   | 4007589999999920 |
| 5102589999999939   | 4000289999999932   | 4007589999999938 |
| 5102589999999947   | 4000289999999940   | 4007589999999946 |
| 5102589999999954   | 4000289999999957   | 4007589999999953 |
| 5102589999999962   | 4000289999999965   | 4007589999999961 |
| 5102589999999970   | 4000289999999973   | 4007589999999979 |
| 5102589999999988   | 4000289999999981   | 4007589999999987 |
| 5102589999999996   | 4000289999999999   | 4007589999999995 |

## Other helpful resources

:::hint{type="info"}
These are external websites and not under control of Crossriver.
:::

- [Visa Acceptance Solutions - Support Center](https://support.visaacceptance.com/knowledgebase/knowledgearticle/?code=000001655)
- [Mastercard Sandbox Test Cards](https://developer.mastercard.com/mastercard-send/documentation/implementation/sandbox-test-cards/)
- [Stripe Test Cards](https://docs.stripe.com/testing)