Measured on 2026-09-20 by asking the site 9 times — once as a browser, once as each of the 8 crawlers that feed ChatGPT, Claude, Perplexity, Gemini, Meta AI, Apple Intelligence and Doubao — and comparing what came back. The AI-training opt-out tokens that never crawl are read from robots.txt instead. Tranco rank #1,656.
| Crawler | HTTP | Result | robots.txt |
|---|---|---|---|
| ClaudeBot (Claude) | 403 | challenged | no-rule |
| GPTBot (ChatGPT) | 403 | challenged | no-rule |
| OAI-SearchBot (ChatGPT Search) | 200 | can read it | no-rule |
| PerplexityBot (Perplexity) | 403 | challenged | no-rule |
| Google-Extended (Gemini, AI Overviews) a robots.txt token, not a crawler: it controls how already-crawled pages may be used, and never makes a request of its own | — | not opted out | no-rule |
| Meta-ExternalAgent (Meta AI) | 403 | challenged | no-rule |
| Amazonbot (Alexa, Rufus) | 200 | can read it | no-rule |
| Bytespider (Doubao, Lark) | 200 | thin | no-rule |
| Applebot (Siri, Apple Intelligence) | 200 | can read it | no-rule |
| Applebot-Extended (Apple Intelligence training) a robots.txt token, not a crawler: it controls how already-crawled pages may be used, and never makes a request of its own | — | not opted out | no-rule |
One email only when a measured crawler flips on bakusai.com, served to refused or back. No schedule, no newsletter; double opt-in, one-click stop.
2026-09-13: 45 · 2026-09-14: 45 · 2026-09-15: 45 · 2026-09-16: 45 · 2026-09-17: 45 · 2026-09-18: 45 · 2026-09-19: 45 · 2026-09-20: 45
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