Does yieldmo.com block AI crawlers?
yieldmo.com blocks 2 of 17 AI crawlers (Meta-ExternalAgent and cohere-ai), and allows 14 (checked 2026-10-01).
Retrieval crawlers are blocked too, so AI assistants that fetch a page live to quote and link it cannot read this site. Its content can still appear in answers from older training data or third-party copies, but not as a fresh, cited source.
Every crawler we tested
| Crawler | Used for | Verdict | What we saw |
|---|---|---|---|
| GPTBot OpenAI | ChatGPT (training) | Allowed | Allowed: robots.txt permits it and the page loaded. |
| OAI-SearchBot OpenAI | ChatGPT search (retrieval) | Allowed | Allowed: robots.txt permits it and the page loaded. |
| ChatGPT-User OpenAI | ChatGPT (retrieval) | Allowed | Allowed: robots.txt permits it and the page loaded. |
| ClaudeBot Anthropic | Claude (training) | Allowed | Allowed: robots.txt permits it and the page loaded. |
| Claude-SearchBot Anthropic | Claude search (retrieval) | Allowed | Allowed: robots.txt permits it and the page loaded. |
| Claude-User Anthropic | Claude (retrieval) | Allowed | Allowed: robots.txt permits it and the page loaded. |
| Google-Extended Google | Gemini (training) | Allowed | Allowed: robots.txt permits it and the page loaded. |
| PerplexityBot Perplexity | Perplexity (retrieval) | Allowed | Allowed: robots.txt permits it and the page loaded. |
| Perplexity-User Perplexity | Perplexity (retrieval) | Allowed | Allowed: robots.txt permits it and the page loaded. |
| CCBot Common Crawl | Common Crawl (research) | Allowed | Allowed: robots.txt permits it and the page loaded. |
| Bytespider ByteDance | ByteDance (training) | Not established | Allowed by robots.txt; the live fetch timed out, so access was not confirmed. |
| Applebot-Extended Apple | Apple Intelligence (training) | Allowed | Allowed: robots.txt permits it and the page loaded. |
| Meta-ExternalAgent Meta | Meta AI (training) | Blocked | Blocked at the server: robots.txt permits it, but the live fetch was refused. |
| Amazonbot Amazon | Alexa (training) | Allowed | Allowed: robots.txt permits it and the page loaded. |
| cohere-ai Cohere | Cohere (retrieval) | Blocked | Blocked at the server: robots.txt permits it, but the live fetch was refused. |
| Diffbot Diffbot | Diffbot (research) | Allowed | Allowed: robots.txt permits it and the page loaded. |
| Timpibot Timpi | Timpi (research) | Allowed | Allowed: robots.txt permits it and the page loaded. |
How that compares
- Meta-ExternalAgent is blocked by 36 of the 241 sites on these pages (14.9%).
- cohere-ai is blocked by 31 of the 244 sites on these pages (12.7%).
How this was measured
We read yieldmo.com’s robots.txt, resolved it with an RFC 9309 matcher for each crawler’s product token, then fetched the homepage once as each crawler. A 403 or a challenge page is a block even when robots.txt allows the crawler; a timeout or rate limit is “not established”, never a block. One probe, from one location, on 2026-10-01, so a rule changed since then is not reflected here. Full methodology.
Check your own site
The free checker runs the same probe on any URL: robots.txt resolved for every AI crawler, then a live fetch as each one, so a CDN or firewall block shows up even when robots.txt looks fine.
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Other sites
- branch.io — blocks none of 17
- flurry.com — blocks none of 17
- unity3d.com — blocks 1 of 17
- globalsign.com — blocks 7 of 17
- pinimg.com — blocks 16 of 17
- fontawesome.com — blocks none of 17