> ## Documentation Index
> Fetch the complete documentation index at: https://docs.joinmassive.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Sticky sessions

> Our ISP proxies support sticky sessions, allowing persistent IP connections and session-based routing without expiration.

## Using Sticky Sessions:

| Key     | Value                                         | Duration      | Examples           |
| ------- | --------------------------------------------- | ------------- | ------------------ |
| session | Any unique identifier of up to 255 characters | No expiration | 0, abc, session123 |

Add a session identifier to keep your requests on the same IP address:

```bash theme={null}
curl --proxy http://isp.joinmassive.com:8000 -U '{PROXY_USERNAME}-session-37:{API_KEY}' ip-api.com
```

When using sticky sessions:

1. The first request with a session ID linked to a specific IP address.
2. All subsequent requests with the same session ID will use that same IP address.
3. Sessions continue indefinitely unless the session identifier is changed.
4. Requests that do not have a session ID will automatically be assigned a new IP address.