Can this prove that AI search crawlers reached my site?

It can provide local evidence from your own access logs when recognizable crawler user agents such as Googlebot, OAI-SearchBot, GPTBot, Applebot, PerplexityBot, or CCBot are present. User-agent strings can be spoofed, so high-stakes bot verification should also use official IP or reverse-DNS verification where available.

Will Google-Extended appear in server logs?

Usually no. Google documents Google-Extended as a robots.txt product token used for control, not as a separate HTTP user-agent string. Search logs should still be checked for Googlebot and related Google crawlers.

Free crawler and log analyzer for bot detection

Crawler and log analyzer for bot detection and AI crawler proof

Q: Is user-agent log analysis enough for bot detection?

User-agent log analysis is a fast first pass for spotting crawler patterns, blocked discovery files, and suspicious status codes. It is not a complete security verification method because user agents can be spoofed; use provider IP ranges, reverse DNS, rate limits, and server-side controls when bot identity matters.

Paste a small sample of nginx, Apache, Cloudflare, or JSONL access logs. The analyzer looks for recognizable search and AI crawler user agents, checks whether core discovery files were requested, flags status-code issues, and produces a copyable proof report.

Fast answer for crawler and log analyzer searches

Use log analysis to separate bot clues from traffic proof.

A crawler and log analyzer is useful when you need a first-pass answer to: did Googlebot, OAI-SearchBot, GPTBot, PerplexityBot, CCBot, or another crawler request the files that matter?

Best fit: crawler and log analyzer, log analysis for bot detection, AI crawler proof, and discovery-file troubleshooting.
Checks first: user-agent token, requested path, status code, /robots.txt, /sitemap.xml, /llms.txt, and priority page hits.
Do not overclaim: a user-agent string is a clue, not identity proof; verify important bots with official IP ranges or reverse DNS when it matters.

Use this for: first-pass bot detection, crawler access proof, robots.txt or sitemap troubleshooting, and checking whether Googlebot, OAI-SearchBot, GPTBot, PerplexityBot, CCBot, or Applebot appeared in a log sample.

Fast demo: load a sample below, run the bot detection log analysis, then compare the crawler summary with your own server logs. The tool runs in the browser and does not upload your log sample.

What log analysis can and cannot prove

Good evidence

Repeated requests to /robots.txt, /sitemap.xml, /llms.txt, and important public pages can show that a crawler or claimed crawler reached your server.

Not enough by itself

A user-agent string alone is not identity proof. For high-stakes bot detection, combine logs with official IP ranges, reverse DNS checks, rate limiting, and private-content access controls.

Paste access logs

Works best with combined log format or JSON lines containing fields such as path, status, userAgent, source, or referrer. Keep samples small and remove private query strings before sharing reports.

Access log sample

Copyable report

Crawler summary

Detected crawlers

Crawler	Hits	Status mix	Important paths

Recommendations

Bot detection FAQ

Is user-agent log analysis enough for bot detection?

No. It is a useful first pass for spotting crawler patterns, blocked discovery files, and suspicious status codes, but user agents can be spoofed. Use provider IP ranges, reverse DNS, rate limits, and server-side controls when bot identity matters.

Which files should I look for in crawler logs?

Start with /robots.txt, /sitemap.xml, /llms.txt, homepage requests, and the priority tools or guides you want crawlers to discover.

Source-backed notes

Google documents Googlebot as the crawler affecting Google Search, while Google-Extended is a separate product token and not a Search ranking signal. Google crawler docs
OpenAI documents OAI-SearchBot, GPTBot, and user-triggered fetchers separately. OpenAI crawler docs
Apple, Perplexity, and Common Crawl publish crawler names that can be checked in logs and robots.txt policies. Applebot, Perplexity crawlers, CCBot