Call before fetching from, citing or acting on a domain. Returns one signed answer: crawler policy as declared (robots.txt per crawler), what each crawler identity was actually served, machine files, declared capabilities with their safety/policy class and whether any was verified, entity reciprocity, and open findings. Each section is declared, observed or not_measured with its time; there is no overall score. An unknown domain returns not_measured (never a guess) and is queued for measurement.