You can view the number of open threads to our server by executing a request through any of the proxy endpoints to the URL:
http://api.proxyrack.net/concurrent

This will return you a raw number with the number of connections we can see open from your account.

Examples

Unmetered Residential:

Please note: Unmetered Residential proxies are no longer available for purchase. Existing subscriptions will continue to work, however.
curl -x unmetered.residential.proxyrack.net:9000 -U username:password http://api.proxyrack..net/concurrent

Premium Residential:
curl -x premium.residential.proxyrack.net:9000 -U username:password http://api.proxyrack.net/concurrent

Private Residential:
curl -x private.residential.proxyrack.net:1000 -U username:password http://api.proxyrack.net/concurrent

USA Rotating Datacenter:
curl -x usa.rotating.proxyrack.net:9000 -U username:password http://api.proxyrack.net/concurrent

Global Rotating Datacenter:
curl -x global.rotating.proxyrack.net:9000 -U username:password http://api.proxyrack.net/concurrent

Result:
40

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