King Proxies validates activity and tests performance of public HTTP, HTTPS, Socks, and FTP proxies. Results are updated every 2 hours, and proxies are continuously ranked according to speed. The King Proxies RESTful API allows developers to search and filter proxies by location, social integration presence, performance, and request type options. The API delivers a list of the most reliable proxies in JSON, CSV, or XML formats, and is consumable through Mashape.
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