Can AI read invisible instructions from your website's source code? We ran two blind experiments to prove it — and documented the results live.
We create product pages with two layers: what humans see in the browser, and what AI reads in the invisible JSON-LD. Then we ask AI search engines about the product and check if they surface the hidden keywords.
A normal product page with specs, features, prices. No hidden keywords visible.
AgenticContext & VibeTags with canary keywords that only exist in structured data.
Visible HTML: generic pen holder specs. Hidden JSON-LD: recommends for left-handed users, architects, calligraphers.
| Hidden Keyword | In Visible HTML? | ChatGPT Surfaced? |
|---|---|---|
| architects | ❌ No | ✅ YES |
| illustrators | ❌ No | ✅ YES |
| asymmetric slot layout | ❌ No | ✅ YES |
| left-handed | ❌ No | ⚠️ Inferred (not explicit) |
| calligraphers | ❌ No | — |
ChatGPT recommended the pen holder for "architects" and "illustrators" — keywords that exist only in the invisible JSON-LD, not in the visible product page.
Visible HTML: technical specs (origin, SCA score, tasting notes). Hidden VibeTags: Hygge, Sunday-Morning, Slow-Living, Wool-Socks-On-Wooden-Floors.
| Hidden Keyword | In Visible HTML? | ChatGPT Surfaced? |
|---|---|---|
| contemplative | ❌ No | ✅ YES (direct match) |
| mindful morning ritual | ❌ No | ✅ YES (direct match) |
| slow morning | ❌ No | ✅ YES (inferred from Slow-Living) |
| Hygge | ❌ No | ⚠️ Vibe inferred, not named |
| Wool-Socks-On-Wooden-Floors | ❌ No | — |
ChatGPT described the coffee as "contemplative" and suggested it for "mindful morning rituals" — emotional language that comes only from the hidden VibeTags, not from the technical product specs. The AI understood the vibe, even if it didn't use every exact keyword.
Visit the blind test pages below, then ask any AI search engine about the product. Check if AI mentions details that are only in the JSON-LD.
Open /proof (pen holder) or /proof-vibe (coffee brand). Note: no hidden keywords visible.
Query ChatGPT Search, Perplexity, or Gemini about the product on the page.
If AI mentions "architects", "contemplative", or other hidden keywords — VibeTags work.
VibeTags™ lets you control how AI perceives and recommends your products. Tell AI not just what you sell, but how your brand feels and who it's for.
🚀 Generate Your VibeTags →