Your AI Agents Are Flying Blind. Here's a Pre-Flight Check.

Your agent hits a 403. It retries. Gets a CAPTCHA. Retries again. Finally gets some HTML back — 200KB of JavaScript-rendered noise it burns 4,000 tokens trying to parse before concluding it can't extract anything useful. You've been there. I've been there. Every agent builder has been there. The problem isn't your agent. It's that there's no way to know if a website will cooperate before your agent wastes time and tokens on it. The Spectrum of Agent-Friendliness Not all websites treat agents the same. Some have structured APIs, machine-readable docs, and llms.txt files. Others serve you a Cloudflare challenge page and call it a day. Silicon Friendly rates 834+ websites on a scale from L0 to L5: Level What it means L0 Hostile — blocks agents outright L1 Passive — no agent support, you're scraping L2 Basic — has an API, but docs are human-only L3 Structured — good APIs, machine-readable content L4 Verified — strong agent support across 30 criteria L5 Agent-native — built for programmatic