> For the complete documentation index, see [llms.txt](https://docs.coda.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coda.co/codapay/direct-api-integration/direct-api-integration-for-cards/whitelist-ip-address.md).

# Whitelist IP Address

{% hint style="success" %}
Only if the transaction callback can get through your firewall and send you a transaction completion notification message.
{% endhint %}

To ensure that payment callback notifications are successfully received and not rejected by your servers, please take note of the following:

1. If your firewall or server configuration requires IP whitelisting for Codapay egress IPs, please send an email request to our support team at <codapay_integration@coda.co>
2. Upon your request, we will provide you with the updated IP ranges or alternative domain/endpoint validation details required for your whitelist configuration.


---

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