# Whitelist Address

When your API key has read and write permissions enabled. Cross-exchange address whitelisting serves two purposes: Enhancing security and facilitating seamless inter-exchange fund transfers via API without interruption. This is a critical step when participating in the funding rate arbitrage market

**Example:** If you only have exchanges A and B, add the deposit address of exchange A to the withdrawal whitelist of exchange B, and vice versa. If you have 3 exchanges (A, B, C), whitelist the deposit addresses of B and C on exchange A. Subsequently, repeat this process for B and C accordingly.

<figure><img src="/files/EUKO1KwhX48oCU5xsKDz" alt=""><figcaption></figcaption></figure>

<mark style="color:red;">**An extremely important**</mark> note is that when whitelisting an address, you must select the **correct chain** for both the deposit address and the whitelist address. (*If exchange A selects the BEP20 network for deposits, then when whitelisting for withdrawals on exchange B, the BEP20 network must also be selected. Choosing the wrong network will result in permanent loss of assets*)

<mark style="color:$danger;">**Important note:**</mark> When retrieving the deposit address for cross-exchange whitelisting, please select <mark style="color:$success;">**Spot**</mark> as the destination wallet. (On some exchanges, funds may be credited by default to Funding or other accounts.) Please refer to the image below to understand how to select it.

<figure><img src="/files/JpCH75urQfv1dQ0WW23C" alt=""><figcaption></figcaption></figure>

:play\_pause:You can watch the video below to understand more clearly:&#x20;

{% embed url="<https://youtu.be/gEb52791LgM?si=FguMF0JyEM0mGKvW>" %}


---

# 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.xapy.io/setup/on-crypto-exchanges/whitelist-address.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.