> For the complete documentation index, see [llms.txt](https://doc.bitbrowser.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.bitbrowser.net/help1/proxy/how-to-use-ip2world-proxy-in-bitbrowser.md).
# 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.