TLDR Web Dev · ARTICLES & TUTORIALS

REVERSE ENGINEERING VERCEL'S BOTID

nullpt.rs23 min read

Summary from the TLDR Web Dev newsletter

Vercel's BotID is an anti-bot solution, which in its Basic mode uses client-side signals to detect bots. Basic mode uses obfuscated JavaScript to collect browser fingerprints and detect automation frameworks, but the current implementation appears to be passive, collecting data rather than actively blocking bots. Deep Analysis mode uses an anti-bot system by Kasada, which is a software security company.