What we tested
Probed live on 23 Aug 2026 against rubric v1. 3 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 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“Browse the full portfolio, from client projects to products we built ourselves.”https://www.wollzelle.com/work.md
Context
4 sites in the index share the category digital product design agency.
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?
2 checks did not pass when we last looked: API catalog, MCP server answers. 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
threeitthreeit designs and builds digital products including strategy, brand systems, UI/UX, web
digital product design agency AdchitectsAdchitects is a full-cycle digital product design agency delivering digital products and f
digital product design agency Vide InfraVide Infra is a design and development agency specializing in digital product, eCommerce,
digital product design agency CheckEverything.atCheckEverything.at provides independent guides on insurance, credit, energy, and tires spe
financial advice BS Elektrobau e.U.BS Elektrobau e.U. is a certified electrician business in Vienna offering electrical insta
electrician Record generated from a live database query. Method: about the index.