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How to Configure Robots.txt for AI Crawlers | Mk2 Technical Guide

How to Configure Robots.txt for AI Crawlers

As AI systems increasingly crawl the web to train models and answer user queries, Australian businesses face a new technical decision: how to configure robots.txt to manage AI crawler access. We help businesses navigate this emerging challenge, balancing the benefits of AI citation against content protection concerns.

Your robots.txt file has always controlled search engine crawlers, but the landscape has expanded dramatically. Major AI platforms now deploy their own crawlers, and your configuration choices directly impact whether your content appears in AI-generated responses.

Understanding AI Crawler User Agents

Traditional search engines use crawlers like Googlebot and Bingbot. AI platforms have introduced new user agents you need to recognise and configure appropriately:

  • GPTBot — OpenAI's crawler for ChatGPT and related products
  • Claude-Web — Anthropic's web crawling agent
  • Google-Extended — Controls Bard/Gemini access separately from search indexing
  • CCBot — Common Crawl bot, used by many AI training datasets
  • Amazonbot — Amazon's crawler for Alexa and AI services
  • PerplexityBot — Perplexity AI's search and answer crawler

The critical distinction is that blocking Google-Extended does not affect your Google Search rankings — it only prevents your content from training Google's AI models and appearing in AI Overviews.

Basic Robots.txt Configuration for AI Crawlers

Your robots.txt file lives at your domain root (e.g., yourdomain.com.au/robots.txt). Here are the common configuration approaches:

Allow all AI crawlers (recommended for AI citation)

If you want AI systems to cite your business when answering relevant queries, maintain open access. Your standard robots.txt allowing Googlebot and other search engines will typically permit AI crawlers by default unless you explicitly block them.

Block specific AI crawlers

To prevent specific AI systems from accessing your content, add explicit disallow rules:

User-agent: GPTBot
Disallow: /

User-agent: Claude-Web
Disallow: /

User-agent: Google-Extended
Disallow: /

Block AI crawlers from specific sections

Many businesses choose a middle path — allowing AI access to public marketing content while protecting premium or proprietary material:

User-agent: GPTBot
Disallow: /members/
Disallow: /premium-content/
Allow: /

Strategic Considerations for Australian Businesses

We advise clients to think carefully before blocking AI crawlers entirely. The businesses gaining visibility in AI-generated responses are those whose content remains accessible for AI systems to reference and cite.

When to allow AI crawlers

Service businesses benefit from AI citation when potential customers ask questions like "Who provides [service] in [location]?" If AI systems cannot access your website, they cannot recommend you. For businesses prioritising discoverability, we recommend keeping AI crawlers enabled.

When to consider blocking

Publishers with paywalled content, businesses with proprietary methodologies they don't want reproduced, or organisations concerned about AI training on their intellectual property may choose to restrict access. However, this comes with a trade-off — reduced AI visibility.

Verifying Your Configuration

After updating your robots.txt file, verify the changes have taken effect:

  • Access your file directly at yourdomain.com.au/robots.txt
  • Use Google Search Console's robots.txt tester for syntax validation
  • Monitor your server logs for AI crawler activity
  • Test with online robots.txt validators that recognise AI user agents

Does blocking AI crawlers affect SEO?

Blocking AI-specific crawlers like GPTBot or Google-Extended does not impact your traditional search engine rankings. These are separate user agents from the primary search crawlers. However, as AI Overviews become more prominent in search results, blocking Google-Extended may reduce your visibility in those AI-enhanced search features.

How quickly do changes take effect?

AI crawlers typically respect robots.txt changes within days to weeks, depending on their crawl frequency. There is no instant removal — previously crawled content may persist in AI training data.

Our Approach to AI Crawler Strategy

We work with Australian businesses to develop robots.txt configurations aligned with their broader digital strategy. For most service businesses, we recommend maintaining AI crawler access while ensuring your content is structured to maximise citation potential. The goal is not just to be crawled, but to be cited — and that requires strategic content alongside technical configuration.