> ## 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.

# Request routing

> Our robust proxy services allows for geotargeting, sticky sessions, device type targeting, and advanced accounting and reporting.

Massive accepts extended user IDs that let you add targeting specifications to requests. Append a standard URL query string with routing parameters to your proxy username. You can combine routing parameters in any order.

## Syntax

Our proxy protocol uses `-` syntax to append routing parameters, which will used throughout our documentation.

```bash theme={null}
curl -x https://network.joinmassive.com:65535 \
     -U '{PROXY_USERNAME}-country-US-zipcode-10001:{API_KEY}' \
     https://cloudflare.com/cdn-cgi/trace
```