Crawler Verdict

A maintained AI-crawler user-agent list plus a weighted heuristic that turns a request into a verdict with a confidence, rather than a boolean from a substring match.

Substring matching on user-agent is the usual approach and it is both over- and under-inclusive: it flags a browser extension whose UA happens to mention a bot, and misses a crawler that rotates strings.

Separates what was CLAIMED from what can be CORROBORATED, because a user-agent is self-reported and treating it as identity is how a blocklist becomes theatre.

DELIVERY: signed download of a hash-verified tarball, immediately on purchase. Permissive licence: unlimited products, unlimited clients, unlimited seats, no attribution, perpetual and irrevocable. One restriction, do not republish the source as source.

Interface

What you call, and what comes back. Types and signatures only — the implementation ships with the source.

  export function isAiCrawler(userAgent: string | null | undefined): boolean;
  export function scoreBot(s: BotSignal): BotVerdict;