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 its MCP server offers
We connected, ran tools/list, and recorded what came back on 23 Aug 2026. 2 tools.
search_departuresget_departure
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
book“Aankomende Tours: Vogelobservatietour met pick-ups beschikbaar”https://windbirds.nl/api/plan/?tour=hd&limit=2000
query_api“Use /api/plan/?tour=hd&limit=2000 on this domain to retrieve the full list”https://windbirds.nl/api/plan/?tour=hd&limit=2000
Context
6 sites in the index share the category birdwatching tour operator, of which 6 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?
2 checks did not pass when we last looked: Markdown twin at a predictable URL, llms.txt. 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
Athom.AgencyAthom.Agency is a Rotterdam-based Shopify developer and digital agency offering Shopify de
shopify developer workin.spaceOnline platform for rental and booking of meeting rooms, private offices, and coworking de
workspace rental Record generated from a live database query. Method: about the index.