{"rewrite":{"id":"r_54bf202f7c722293cbf27cc1","clusterId":"c_41e9d517572f65dc49e31ee8","slug":"cloudflare-s-precursor-analyzes-entire-sessions-to-detect-bots-beyond-captcha","model":"deepseek-v4-flash","headline":"Cloudflare's Precursor Analyzes Entire Sessions to Detect Bots Beyond CAPTCHA","summary":"Cloudflare announced Precursor, a verification system that analyzes visitor behavior across entire web sessions to distinguish humans from bots and AI agents. It collects mouse movements, keyboard timing, and page focus data via lightweight JavaScript, evaluating patterns over time rather than at a single checkpoint. Precursor is rolling out to Enterprise Bot Management users and can be used alongside Cloudflare Turnstile.","whyItMatters":"As bots become capable of passing CAPTCHA by operating real browsers, Precursor extends detection to the full session, making automated behavior harder to disguise.","webCardHtml":"\u003cp\u003ePrecursor works by inserting JavaScript into enabled websites that collects mouse pointer trajectories, keyboard operation timing, input field focus, and page display time. The data is sent periodically to Cloudflare\u0026#39;s servers, where it is assessed in combination rather than individually. Keyboard input records only timing and rhythm, not actual characters, and behavioral data is not linked to user accounts or permanent profiles. The analysis results accumulate per session, so a bot reloading the page cannot reset the recorded characteristics. Cloudflare recommends disabling the existing JavaScript Detections feature when enabling Precursor.\u003c/p\u003e","blueskyPost":"Cloudflare's new Precursor system analyzes mouse movements, keyboard timing, and page focus across entire sessions to spot bots that pass CAPTCHA. It rolls out to Enterprise users now, with two modes: Minimize Friction and Maximize Security.","twitterPost":"Cloudflare's Precursor analyzes full session behavior (mouse, keyboard timing, page focus) to detect bots that pass CAPTCHA. It rolls out to Enterprise users. Two modes: Minimize Friction and Maximize Security.","threadsPost":null,"newsletterBlurb":"Cloudflare announced Precursor, a verification system that analyzes visitor behavior across entire web sessions to distinguish humans from bots. It collects mouse movements and keyboard timing via JavaScript, evaluating patterns over time. The system is rolling out to Enterprise Bot Management users and can be used alongside Cloudflare Turnstile.","attributionJson":"[{\"source\":\"GIGAZINE\",\"url\":\"https://gigazine.net/news/20260714-cloudflare-precursor/\",\"title\":\"Cloudflare's New 'Precursor' Technology Distinguishes AI Agents from Humans by Detecting AI that Behaves Human-like from On-site Actions\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4182,"outputTokens":1668,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1783998943,"createdAt":"2026-07-14T03:07:28.000Z","publishedAt":"2026-07-14T03:07:29.000Z","updatedAt":"2026-07-14T03:07:28.000Z"},"cluster":{"id":"c_41e9d517572f65dc49e31ee8","canonicalTitle":"AIエージェントと人間を見分けるCloudflareの新技術「Precursor」が登場、人間っぽく振る舞うAIをサイト内の行動から見破る","representativeArticleId":"a_24a914b9af649f319a4bca23","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[],\"studios\":[],\"people\":[],\"type\":\"news\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-07-14T02:15:00.000Z","lastSeenAt":"2026-07-14T02:15:00.000Z","updatedAt":"2026-07-14T03:07:29.000Z"},"attribution":[{"source":"GIGAZINE","url":"https://gigazine.net/news/20260714-cloudflare-precursor/","title":"AIエージェントと人間を見分けるCloudflareの新技術「Precursor」が登場、人間っぽく振る舞うAIをサイト内の行動から見破る"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":[],"studios":[],"people":[],"type":"news","domain":"other","is_roundup":false},"keyFacts":null}