# Testing

## Payrexx Pay Plus

In this article, you can find a list of test credit cards for Payrexx Pay Plus: [Testing - Docs](https://docs.payrexx.com/merchant/payment/testing#credit-cards-for-testing)

### Postfinance, Ogone, Concardis, Viveum

<table><thead><tr><th width="167">Credit card</th><th>Number</th><th width="76">CVC</th><th>Expiry date</th></tr></thead><tbody><tr><td>Visa</td><td><code>4111 1111 1111 1111</code></td><td>123</td><td>actual month and year</td></tr><tr><td>Mastercard</td><td><code>5399 9999 9999 9999</code></td><td>123</td><td>actual month and year</td></tr></tbody></table>

### Stripe

A list of credit cards for testing, you can find on: <https://stripe.com/docs/testing>

### Paypal

A list of credit cards for testing, you can find on: <https://developer.paypal.com/tools/sandbox/card-testing/>

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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.payrexx.com/developer/testing/testing.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.