unverifiable
The third outcome, and the one most tools omit.
What unverifiable does not show
A profile behind a login wall, a 429, or a shell page under 512 bytes can be neither confirmed nor accused, and folding it into either bucket produces a number that overstates or understates by construction.
Where unverifiable comes up on this site
- Dead link or blind spot? When a checker's failure is its ownUnverifiable is a fact about us.
- AI crawler list: what each bot does and how to verify itThe names you will see, and whether the claim can be checked Unverifiable is not forgery.
- How to measure AI visibility yourself: three checksOperators with no published feed, such as Meta-ExternalAgent, Bytespider, SemrushBot and DataForSeoBot, are unverifiable rather than fake: report them as a separate bucket instead of folding them into either.
- How to verify Googlebot, GPTBot and other crawlers by IPTwo ways to verify a crawler request, and what each needs from the operator .t{font:600 13px system-ui,sans-serif;fill:var(--ink)}.s{font:12px…
- Verify GPTBot, ClaudeBot and PerplexityBot: tools comparedWhy “unverifiable” is its own answer Not every crawler operator publishes addresses ( which ones do not ).
Definitions that name unverifiable
own-host loop · forged crawler identity · denominator note · rate limiting · visitor resolve · agent traffic index
Related terms in Crawlers and access
Who is fetching, whether they are who they claim, and what your rules actually permit.
visitor resolve · published crawler ranges · operator origin · signed agent · agent arrival · agent conduct record · agent traffic index · user-triggered fetch exemption · retrieval crawler · user-triggered fetch · verified crawler · forged crawler identity · 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 · user agent · datacenter IP · vantage point · rate limit · delivery comparison · honeypot
Questions about unverifiable
What is unverifiable?
The third outcome, and the one most tools omit.
What does unverifiable not show or guarantee?
A profile behind a login wall, a 429, or a shell page under 512 bytes can be neither confirmed nor accused, and folding it into either bucket produces a number that overstates or understates by construction.
Which area of the glossary does unverifiable belong to?
Crawlers and access: Who is fetching, whether they are who they claim, and what your rules actually permit.
← forged crawler identity · robots.txt →
See it in the full glossary · 772 terms across 19 areas.
Free browser extension
See this on any site you visit, in one click.
CrawlCheck for Chrome grades every site you visit A–F and shows, from your own browser, what search engines and AI assistants are actually served. Free, no account.