# nano.az — robots.txt
#
# Policy: retrieval / citation crawlers are allowed (they send referral
# traffic); model-training crawlers are blocked. Cloudflare's measured
# crawl-to-refer ratios are 887:1 for OpenAI and 50,000:1 for Anthropic —
# training crawls cost bandwidth and return nothing.
#
# Utility pages are deliberately NOT disallowed here. They carry a noindex
# meta tag, and a URL blocked in robots.txt can never be crawled, so Google
# would never see that noindex — the two directives cancel each other out.

User-agent: *
Allow: /

# ---------------------------------------------------------------------------
# Retrieval / citation crawlers — allowed. This is the AI referral channel.
# ---------------------------------------------------------------------------
User-agent: Googlebot
Allow: /

User-agent: Googlebot-Image
Allow: /

User-agent: Storebot-Google
Allow: /

User-agent: bingbot
Allow: /

User-agent: Applebot
Allow: /

User-agent: OAI-SearchBot
Allow: /

User-agent: ChatGPT-User
Allow: /

User-agent: Claude-User
Allow: /

User-agent: Claude-SearchBot
Allow: /

User-agent: PerplexityBot
Allow: /

User-agent: Perplexity-User
Allow: /

User-agent: DuckAssistBot
Allow: /

User-agent: MistralAI-User
Allow: /

User-agent: Amzn-SearchBot
Allow: /

User-agent: cohere-ai
Allow: /

# ---------------------------------------------------------------------------
# Model-training crawlers — blocked.
# Flip any single entry to "Allow: /" to trade bandwidth for future
# model-memory presence. Retrieval bots above are unaffected either way.
# ---------------------------------------------------------------------------
User-agent: GPTBot
Disallow: /

User-agent: ClaudeBot
Disallow: /

User-agent: anthropic-ai
Disallow: /

User-agent: Claude-Web
Disallow: /

User-agent: Google-Extended
Disallow: /

User-agent: Applebot-Extended
Disallow: /

User-agent: CCBot
Disallow: /

User-agent: Amazonbot
Disallow: /

User-agent: meta-externalagent
Disallow: /

User-agent: Meta-ExternalAgent
Disallow: /

User-agent: cohere-training-data-crawler
Disallow: /

User-agent: AI2Bot
Disallow: /

User-agent: Ai2Bot-Dolma
Disallow: /

User-agent: Timpibot
Disallow: /

User-agent: PanguBot
Disallow: /

User-agent: Diffbot
Disallow: /

User-agent: omgili
Disallow: /

User-agent: ImagesiftBot
Disallow: /

# Bytespider (ByteDance) and xAI are documented to ignore robots.txt and to
# rotate residential IPs / spoof browser user-agents. Listing them is a
# formality — enforce these at the Cloudflare WAF, not in this file.
User-agent: Bytespider
Disallow: /

User-agent: TikTokSpider
Disallow: /

# facebookexternalhit is a link-preview fetcher, not an AI crawler.
# Blocking it breaks social sharing cards — leave it allowed.

Sitemap: https://nano.az/sitemap.xml