How to Choose a CAPTCHA Recognition API: Six-Step Evaluation from Type Verification to Small-Traffic Comparison

When choosing a CAPTCHA recognition API, unit price and advertised average latency are not enough for a decision. This article provides an actionable six-step sequence: verify actual CAPTCHA types and interaction depth, determine whether proxy/session binding is needed, measure success by target-site acceptance rate rather than API return rate, look at P50/P95 and end-to-end latency, calculate true cost per completed business action, and finally assess integration and migration costs, with a checklist for small-traffic comparison testing.