# What are the differences between the authentication methods of API and username/password?

### API:

1\. Need to add the allowlist IP to allow requests from whitelisted IP addresses to access the proxy service.

2\. There's a 1 second interval between each API request. A maximum of 900 proxies can be generated for the proxy list.

3\. For GB plans, a new IP is generated for each new request. For IP plans, the IP is rotated every 5 minutes.

### Username/Password:

1\. Need to create sub-accounts to allow users to access the proxy service with the sub-account's username and password.

2\. A maximum of 10000 proxies can be generated for the proxy list.

3\. For GB plans, the rotating IP option is to generate a new IP for each new request. The sticky IP option is 5 minutes by default, and it can be customized from 5 to 180 minutes. The IP will be rotated when the time is up. In addition, the IP plan only supports the sticky IP option, and it can be customized from 5 to 60 minutes.


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