---
updatedAt: 2026-09-16T17:12:44.000Z
agentTools:
  projectIndex: https://docs.staxpayments.com/llms.txt
---

# Access Requirements

<Callout icon="📘" theme="info">
  Currently Tap to Pay is in Beta Release. If you would like to participate, please reach out to your Account Manager.
</Callout>

<br />

The Stax iOS SDK must be able to communicate with <Anchor label="CardEaseXML" target="_blank" href="https://live.cardeasexml.com">CardEaseXML</Anchor> and CardEaseTMS [CardEaseTMS](https://tms.cardeasexml.com) on the payment gateway platform. This may require changes to your firewall configuration.

The table below lists the IP addresses for each external service used by the SDK. **Port 443** is used for each.

| Service     | Platform   | IP Addresses                                                                                                                           |
| :---------- | :--------- | :------------------------------------------------------------------------------------------------------------------------------------- |
| CardEaseXML | Production | 91.197.92.250 91.197.93.250 91.197.93.251 91.197.94.250 91.197.94.252 74.120.0.250 74.120.1.250 74.120.1.251 74.120.2.250 74.120.2.252 |
| CardEaseXML | Test       | 91.197.92.230 91.197.93.230 91.197.94.203 91.197.95.230                                                                                |
| CardEaseTMS | Production | 91.197.92.239 91.197.93.239 91.197.94.239 74.120.0.239 74.120.1.239 74.120.2.239                                                       |
| CardEaseTMS | Test       | 91.197.92.219 91.197.93.219 91.197.94.219 91.197.95.219                                                                                |

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