How do I bypass anti-bot pages when scraping for an LLM?

Bypass anti-bot pages when scraping for an LLM by using a fetch tool with realistic browser headers, TLS fingerprint matching, and fallback to browser automation when needed — or skip the problem by routing through services that handle it for you. The most common interstitials are Cloudflare Turnstile, PerimeterX, DataDome, and Akamai Bot Manager. For polite, low-volume agent traffic, sending a real-browser User-Agent plus Accept, Accept-Language, and Sec-Fetch-* headers passes ~70% of soft challenges; AgentFetch sets these by default. For JS challenges that require execution, you need a real browser — Browserless, Playwright, or Firecrawl's JS-rendering mode. For hard CAPTCHAs (Turnstile, hCaptcha), residential-proxy services like Bright Data or ScrapingBee become necessary, though they push per-page cost from $0.001 to $0.01-$0.05. Honest advice for agent developers: most agent workloads target public APIs, docs sites, GitHub, news, and Wikipedia — none of which need anti-bot bypass. If your agent is hitting Cloudflare walls on a specific domain, consider whether you should be using their official API instead. AgentFetch surfaces clear error codes (anti_bot_detected, js_required) so the agent can reason about the failure.