We have made a few changes to the way the proxy detector api detects public proxy servers. This change prevents a rather large security flaw where someone could have potentially tricked the proxy checker into thinking any ip address was a public proxy server by posting the target ip adddress on a pastebin or forum along with proxy related keywords.
The update is now live and working as expected. You should not notice any changes except having virtually zero false positives in the future.
Visit the Proxy Detector API