Python's urllib gets blocked by Cloudflare protection on many websites. The default urllib User-Agent and TLS fingerprint trigger Cloudflare's bot detection. ## Agent Decision Tree 1. Are you using urllib or requests with default settings? → go to Solution A 2. Must you use Python? If no → go to Solution B (use curl) 3. Working behind a corporate proxy? → check Solution C

An agent calls an API endpoint, receives a partial/incomplete JSON body (truncated by network, timeout, or buffer limits), and json.loads() fails with JSONDecodeError. ## Agent Decision Tree 1. Check if the response body ends mid-structure → go to Solution A 2. If the response is completely empty → go to Solution B 3. If using Python requests without stream=True → check Solution C