ChatGPT uses SerpAPI to pull Google results, not its own crawler
Summary
ChatGPT pulls search results from Google via SerpAPI rather than crawling the web directly, meaning your Google rankings determine AI visibility. Since AI platforms rely on Google's index as their primary content source, crawlability and indexability are now prerequisites for both traditional and AI search. Fix indexing errors, ensure your robots.txt allows AI crawlers to build proprietary indexes, and structure content for conversational queries.
What happened
ChatGPT uses a third-party service called SerpAPI to pull scraped Google search results rather than relying solely on its own crawler or index. Botify’s research into how AI platforms source content confirms that OpenAI isn’t alone in this practice. Meta and Perplexity are reportedly SerpAPI customers as well.
The data from SerpAPI helps ChatGPT deliver real-time answers to queries that fall outside its training data or OpenAI’s internal index. Botify’s analysis also notes that these companies are building proprietary indexes to reduce dependence on Google and Bing, but the current reality is simpler: most AI platforms still lean on traditional search results to source the content they recommend.
Why it matters
The SerpAPI dependency means your Google rankings directly influence whether AI platforms surface your content. If a page ranks well in Google, it has a better chance of being pulled into ChatGPT’s answers. If it doesn’t rank, ChatGPT may never see it.
Botify frames this around the compressed customer journey inside AI interfaces. Consumers ask conversational questions and get instant recommendations without opening a browser. A single interaction can move someone from discovery to decision. The content that feeds those answers comes from Google’s index, accessed through services like SerpAPI.
Pages that are invisible to crawlers won’t appear in any index, traditional or AI. Crawlability and indexability are now prerequisites for visibility across both channels. A page blocked by robots.txt or stuck behind client-side rendering that Googlebot can’t parse is invisible to ChatGPT too, because ChatGPT is reading Google’s results.
The proprietary indexes being built by OpenAI, Meta, and Perplexity add a second layer. These systems aim to crawl and categorize web content directly, separate from Google. Botify describes this as an effort to “expand each platform’s reach and establish autonomy outside traditional search.” For now, though, Google’s index remains the primary source.
What to do
Treat Google indexing as your AI search foundation. Run a crawl audit in Google Search Console to identify pages that aren’t indexed. Fix crawl errors, broken canonicals, and noindex tags on pages you want AI platforms to find.
Check your robots.txt for AI crawler blocks. If you’ve blocked OAI-SearchBot (OpenAI’s crawler) or PerplexityBot, those platforms can’t build you into their proprietary indexes. Decide whether the tradeoff is worth it. Blocking the crawler doesn’t stop SerpAPI from pulling your Google listing, but it does prevent inclusion in their growing independent indexes.
Ensure your content answers conversational queries directly. AI platforms compress the search journey by matching user intent to a single answer. Pages structured around clear questions and concise answers are more likely to be selected. Use structured data from Schema.org (FAQ, HowTo, Product markup) to make your content machine-readable.
Strengthen foundational brand content. Botify notes that model training data captures evergreen brand information like company history, leadership, and flagship products. Pages covering these topics with consistent, factual details help LLMs build accurate representations of your brand. Training data cutoffs lag behind the live web, so focus on durable content that stays accurate over time.
Monitor which AI crawlers hit your site. Check your server logs for OAI-SearchBot, ClaudeBot, PerplexityBot, and GPTBot. Log analysis tells you which platforms are building their own indexes of your content and how frequently they crawl.
Watch out for
SerpAPI access doesn’t equal direct crawling. Blocking GPTBot or OAI-SearchBot in robots.txt won’t stop your content from appearing in ChatGPT answers if your pages rank in Google. ChatGPT reads Google’s results through SerpAPI regardless of whether its own crawler can access your site.
Proprietary indexes are a moving target. OpenAI, Meta, and Perplexity are all building their own web indexes. The balance between SerpAPI-sourced results and proprietary index results will shift over time. A page that gets traffic from ChatGPT today because it ranks in Google may need direct crawler access tomorrow to maintain visibility.