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 duca.main-kill-isr.mintlify.me — the standard set for sites on mintlify.
search_ducaquery_docs_filesystem_ducasubmit_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
read“Fetch the complete documentation index at: https://docs.duca.dev/llms.txt”https://docs.duca.dev/llms.txt
Context
3 sites in the index share the category full-stack developer portfolio.
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
SUKO KUOPortfolio of SUKO KUO, a full-stack developer specializing in Next.js products, internal t
full-stack developer portfolio David Bueno VallejoPersonal site of David Bueno Vallejo featuring information on conferences, projects, and d
consulting and research Cameron RyePortfolio of Cameron Rye, a software engineer connecting legacy protocols to modern AI wit
software engineer portfolio Bart MageraBart Magera provides data-first SEO consulting focused on semantic SEO, topical authority,
seo consulting Courtney RobertsonCourtney Robertson is an open source developer advocate focused on developer education, re
developer relations Sarah Valentina WinkhausSarah Valentina Winkhaus is a speaker, moderator, author, and content creator offering key
speaker and moderator Record generated from a live database query. Method: about the index.