What we tested
Probed live on 23 Aug 2026 against rubric v1. 4 of 5 checks passed.
PROBE-VERIFIEDtier 2 of 3
✓Markdown negotiationAccept: text/markdown
✓Markdown twin at a predictable URL/page.md
✓llms.txt/llms.txt
—API catalogRFC 9727
✓MCP server answers/.well-known/mcp/server-card.json → tools/list
What its MCP server offers
We connected, ran tools/list, and recorded what came back on 23 Aug 2026. 3 tools, served from t3gemstone-754bcb96.main-kill-isr.mintlify.me — the standard set for sites on mintlify.
search_t3_foundation_gemstone_projectquery_docs_filesystem_t3_foundation_gemstone_projectsubmit_feedback
What an agent could do here
Read from the page’s own content, with the wording each was drawn from. Inference is kept separate from tested facts — an agent completing the action is tier 3.
UNVERIFIED
contact“Görüş, öneri, soru vb. konularda Topluluk Forumunu, geliştirme veya hata bildirimleri için Github sayfasını ziyaret edebilirsiniz.”https://community.t3gemstone.org/
contact“Görüş, öneri, soru vb. konularda Topluluk Forumunu, geliştirme veya hata bildirimleri için Github sayfasını ziyaret edebilirsiniz.”https://github.com/t3gemstone
Context
2 sites in the index share the category development board documentation.
How we grade
Three tiers. Every listing shows which one it has reached, and when. The rubric.
tier 1Declared
The site says agents are welcome in its robots.txt. A permission, not a capability.
tier 2Probe-verified
We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
tier 3Behaviourally verified
An agent completed the action end to end — booked, bought, submitted — and it worked.
Own this site?
1 check did not pass when we last looked: API catalog. Each is a small, specific fix; the rubric says exactly what we look for.
Behavioural verification — an agent completing your booking, purchase or contact flow end to end, with the date published here — opens to a small founding cohort first. Leave an email to be in it.
Related verified sites
T3 Foundation - Deneyap KartDocumentation site for T3 Deneyap Kart development boards, IDE, block coding, projects, an
development board documentation Ekras TeknolojiEkras Teknoloji is an Ankara-based company specializing in indoor and outdoor LED screen s
led screen provider Freeze-Dried.coB2B supplier of freeze-dried fruits from Turkey offering 24+ varieties, private label serv
freeze-dried fruit supplier Kinetik BilişimKinetik Bilişim offers corporate email security, cybersecurity, and managed IT services in
technology solutions provider Reta LEDReta LED is an Ankara-based manufacturer and supplier of indoor and outdoor LED screens, d
led screen manufacturer TRMedyaTRMedya is a Turkish digital growth platform offering social media services and free tools
social media services Record generated from a live database query. Method: about the index.