Glossary · Crawlers and access
forged crawler identity
A request whose user-agent names a known crawler while its source address falls outside the ranges that operator publishes. Verified against a published feed it is a fact, not an accusation; without a feed it is unverifiable.
Measured live on /tools.
Terms this definition uses
Crawlers and access
Who is fetching, whether they are who they claim, and what your rules actually permit.
retrieval crawler · user-triggered fetch · verified crawler · unverifiable · robots.txt · user-agent group · AI opt-out · Content-Signal · crawl budget · cloaking · challenge page at 200 · uniform refusal · nonexistent-path control · blocked render resource · off-host redirect · homepage refused · FCrDNS · Crawler trap · Conditional request · ASN blocking · operator feed · residential proxy · Google-Extended · Google-Agent · GPTBot vs OAI-SearchBot · ClaudeBot vs Claude-User · PerplexityBot vs Perplexity-User · CCBot · Bytespider · agentic traffic · crawler classification
← verified crawler · unverifiable →
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