What Is an AI Crawler, and How Do I See Which Ones Visit My Site?

How do I find out which AI bots are crawling my website?

You find out by checking your server logs or a bot-analytics tool for known AI user-agent names like GPTBot, ClaudeBot, and PerplexityBot. Each AI crawler identifies itself with a text label when it visits. Once you know the labels, you can spot them, count them, and decide what to allow.

Most site owners have no idea this traffic exists. Their pages are being read every day by crawlers that feed ChatGPT, Claude, Gemini, and Perplexity, and none of it shows up in a normal marketing report. That blind spot is a problem, because these bots decide whether AI answers ever mention your business.

As an AEO and GEO optimiser, this is one of the first things I check on a new site. If the AI crawlers are being blocked or ignored, the client cannot get cited by AI answer engines no matter how good their content is. So the very first step is simply seeing who is visiting.

What is an AI crawler, exactly?

An AI crawler is an automated program that reads web pages to feed an AI system. Some collect text to train models. Others fetch pages in real time so an answer engine can quote them. Both types announce themselves with a user-agent string, which is just a name in the visit record.

A crawler is not a person clicking around. It is software that requests your pages the way a browser would, then stores or processes what it finds. Search engines have done this for decades. The new wrinkle is that AI companies now run their own crawlers for their own purposes.

The reason this matters for your business is citation. When an AI answer engine like Perplexity or Google's AI mode names a source, it can only name pages its crawler was allowed to read. If your site blocks the crawler, you are invisible in that answer. Seeing the crawlers is step one to being cited.

What are the main AI crawlers I should know by name?

The big ones are GPTBot from OpenAI, ClaudeBot from Anthropic, Google-Extended from Google, PerplexityBot from Perplexity, CCBot from Common Crawl, and Bytespider from ByteDance. Apple runs Applebot-Extended, and Amazon runs Amazonbot. Each name is the label that bot uses when it requests your pages.

OpenAI actually runs several. GPTBot is its training crawler, OAI-SearchBot indexes pages for its search product, and ChatGPT-User fetches a page when a person asks ChatGPT to look something up, per OpenAI's own documentation in 2026. Knowing the difference tells you why a bot visited.

Anthropic works the same way, with ClaudeBot, Claude-SearchBot, and Claude-User as separate names, according to Anthropic's own documentation in 2026. This split is important. Allowing one does nothing for the others, because your rules apply to each name on its own. I go deeper on configuring these in my guide to robots.txt strategy for AI bots.

What is the difference between a training crawler and a search crawler?

A training crawler collects content to help build or improve an AI model. A search crawler fetches your page so the AI can cite it in a live answer. The difference matters because you may want to allow one and block the other, and each uses a separate name.

Think of it as two different favors being asked. A training crawler like GPTBot or Google-Extended wants to use your words to teach a model. A search crawler like OAI-SearchBot, Claude-SearchBot, or PerplexityBot wants to point users back to your page when it answers a related question.

Many business owners are happy to be cited but unsure about training. The good news is you can usually allow AI search while blocking AI training, by permitting the search crawlers and disallowing the training ones in your rules. That balance is a real choice you get to make on purpose.

How much of my traffic is actually AI bots now?

It is more than most people expect and growing fast. Cloudflare reported that GPTBot's share of verified bot traffic rose from 4.7% in July 2024 to 11.7% in July 2025, based on Cloudflare's own analysis. Across all AI crawlers combined, this is now a real slice of every content site's traffic.

The month-to-month picture is messy. Cloudflare Radar data shows the lead swapping between GPTBot, ClaudeBot, and Amazonbot from one month to the next, so no single bot stays on top for long. Reading one month as a permanent ranking is a mistake, because the volumes bounce around.

What is not messy is the direction. AI crawler traffic is clearly rising year over year, and it now shapes whether your pages feed AI answers at all. I dig into what that volume means for site owners in my piece on how AI crawlers handle JavaScript-rendered pages, which is where a lot of sites quietly lose out.

How do I actually see AI crawlers in my own logs?

You see them by reading raw server logs or a bot-analytics dashboard and filtering for the AI user-agent names. If you host on Webflow, you usually put Cloudflare in front of the site and use its bot analytics, since Webflow's standard hosting does not hand you raw logs to grep through.

Cloudflare is the practical answer for most of my clients. Its dashboard groups bot traffic and can flag AI crawlers by name, so you can watch GPTBot or ClaudeBot activity without touching a log file. Cloudflare Radar also shows network-wide AI crawler trends you can compare your own site against.

If you do have log access, the method is simple. Search the user-agent field for strings like "GPTBot", "ClaudeBot", or "PerplexityBot" and count the hits over a week. That count is your baseline. Once you know it, you can tell whether a rule change actually let more crawlers in or shut them out.

Do these AI crawlers respect my robots.txt?

The major, named crawlers say they do. OpenAI, Anthropic, Google, Apple, and Perplexity all state that their crawlers obey robots.txt rules, based on their own published documentation in 2026. So a correct robots.txt is your main control for the big, well-behaved bots.

Not every crawler is so polite. CCBot, Bytespider, and some scraper bots have mixed compliance records, meaning a robots.txt rule may not stop them reliably. For those, you need a firewall or a service like Cloudflare that can block by network signature, not just by a polite request.

This is why I treat robots.txt as necessary but not sufficient. It handles the honest majority, which is most of the traffic that matters for AI citation. For the dishonest minority, you need a harder block. Knowing which bots fall into which bucket is the whole game.

Should I block AI crawlers or let them in?

For most businesses that want to be found in AI answers, you should let the search crawlers in. Blocking them guarantees you cannot be cited by that engine. The real decision is narrower: allow the crawlers that drive citations, and choose separately whether to allow the ones that only train models.

I almost never advise a client to block AI search crawlers. If Perplexity or ChatGPT cannot read your page, they cannot recommend your business, and that is lost visibility you will not get back. For a company trying to grow, that is the opposite of what you want.

Training is where opinions differ, and that is fine. Some clients are glad to feed models in exchange for reach. Others prefer to hold their content back. Both are valid, and the point is that you can decide on purpose instead of by accident. That decision only exists once you can see the crawlers.

How do I know a bot is real and not faking its name?

You verify a bot by checking that its request comes from the network the vendor says it owns, not just by trusting the name. Any script can claim to be GPTBot. The real ones come from published IP ranges, and reverse DNS or a service like Cloudflare can confirm the visit is genuine.

Faked user-agents are common because the name is just text a bot chooses to send. A scraper can label itself "GPTBot" to look trustworthy while doing something else. So the name alone is a weak signal, and treating it as proof will mislead you.

The fix is verification against the source. OpenAI, Anthropic, and others publish the IP ranges their crawlers use, and Cloudflare maintains a verified-bot list that checks this for you. I walk through this exact process in my guide to verifying AI crawlers with Cloudflare, because a fake bot in your data leads to bad decisions.

What should I do about AI crawlers this week?

This week, find out who is visiting. Put Cloudflare in front of your site if it is not already, look at the bot analytics, and note which AI crawlers appear and how often. Then check your robots.txt to confirm you are allowing the search crawlers you want to be cited by.

That single afternoon of work turns a total blind spot into a clear picture. You will know whether GPTBot, ClaudeBot, and PerplexityBot are reading your pages, and whether your rules are helping or hurting your chances of showing up in AI answers. Most sites discover something surprising.

If you want help auditing which AI crawlers reach your site and setting the rules so the right ones get in, let's chat. I am happy to look at your logs and your robots.txt and tell you exactly where you stand. Reach out through pravinkumar.co and we can sort it out.