SupportFAQQuick answers to the questions developers ask most often when integrating NSLSolver.FAQ How do I get an API key?Which captcha types are supported?What happens if a solve fails?What's the rate limit?How long does a solve take?How do I find a Turnstile site_key?Should I use Turnstile or Challenge for this page?When do I need a proxy?Which proxy schemes work?What does 'Insufficient balance' mean?What does 'Rate limit exceeded: max N captchas per minute' mean?Can I run my own pool of workers across multiple keys?Why is my cf_clearance cookie being rejected?My Kasada solves return empty headers — what's wrong?ProxiesWhen to use a proxy, what formats are accepted, residential vs datacenter trade-offs, and how to keep cf_clearance valid.ChangelogNotable releases of the NSLSolver public API.