“Short answer: there’s no single “best” marketplace - the right one depends on what you’re buying or selling, your scale, and how much control you want. Below is a practical, use‑case - focused list with recommendations and why you’d pick each. How to choose (quick): match your product/service to marketplace strengths - Type of product (new retail, used, handmade, luxury, wholesale, digital, services) - Audience (mass c…”
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25/100 AI-readiness
www.ebay.com (official site, from public records) · can the AI crawlers read the site? Checked by code, not by a model.
AI assistants can read pages when answering (robots.txt):Blocked from the whole site: Perplexity (PerplexityBot). That assistant cannot read anything you publish when a buyer asks about you; ChatGPT (OAI-SearchBot, ChatGPT-User), Claude (Claude-User, Claude-SearchBot), Google AI Overviews and AI Mode (Googlebot), Microsoft Copilot (Bingbot) are limited to parts of the site.
AI models may train on the site (robots.txt):OpenAI (GPTBot), Anthropic (ClaudeBot), Common Crawl (CCBot), Apple (Applebot-Extended), Meta (Meta-ExternalAgent), ByteDance (Bytespider) are blocked, so future versions of those models will not learn about the brand from its own pages (Common Crawl feeds many models' training sets). A deliberate choice for many brands: it does not stop assistants reading the site when answering, but what they know from memory then comes from other people's pages.
llms.txt for AI assistants:Not found. An llms.txt gives AI tools a reliable, curated summary of who you are.
Homepage reachable:Homepage returned HTTP 403.
One live question to one assistant, asked by PollyX on Oct 15, 2026 and asked again about once a month. Assistants answer differently every time, so this is a sample, not a score. The full check asks 12 buyer questions of nine assistants and records every page each one reads. How AI visibility is measured
Is eBay the first recommendation, and how is it described?
That was one question to one assistant. The full check asks nine assistants 12 buyer questions each, shows where eBay is first, listed or absent, who is named instead, which pages the assistants read, and what to publish to change it.