# How to use IP2World Proxy in BitBrowser?
### Step 1.
First register an account on the IP2World Proxy website and select the proxy you want. （Here is an example of a Rotating Residential Proxies）
### Step 2.
Rotating Residential Proxies can be used in two ways: API and User+Pass Auth.
API:
To use API mode, you first need to add a whitelist.
Click Get Proxies – IP Whitelist, add your local ip to whitelist.
Click Get Proxies – API
User+Pass Auth:
To use User+Pass Auth mode, you first need to add a sub-account, it means accounts and passwords.
Click Get proxies – Auth-User List, add your own sub-account.
Click Get Proxies – User+Pass Auth
### Step 3.
Input proxy information in BitBrowser to use your proxy.
### Step 4.
Open your browser to use your proxy.
---
# 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://doc.bitbrowser.net/help1/proxy/how-to-use-ip2world-proxy-in-bitbrowser.md?ask=
```
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.
