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. 5 tools.
list_postsget_postlist_pagesget_pagesearch_content
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“Jetzt kostenloses Erstgespräch vereinbaren”https://4eck-media.de/kontakt/
Context
36 sites in the index share the category web design agency, of which 20 are transactional.
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: Markdown twin at a predictable URL. 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
DuegencyDuegency is a web design agency offering web and online store development, SEO, and digita
web design agency DuegencyDuegency is a web design and development agency specializing in websites and online stores
web design agency EiQ InteractiveEiQ Interactive provides web design, custom applications, and marketing services for Misso
web design agency www.rheinformat.comRHEINFORMAT is a Cologne-based agency specializing in TYPO3 web design, SEO, branding, and
web design agency Studio AMStudio AM is a Los Angeles agency offering custom website design, branding, digital market
web design agency Suncoast LocalSuncoast Local offers custom-built websites with hosting, AI chatbot, and weekly content f
web design agency Hugo HervéHugo Hervé offers personalized website creation, e-commerce, SEO, and maintenance services
web design agency Record generated from a live database query. Method: about the index.