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
apply“Apply for a rental: https://rentbutter.com/apply/marblestone”https://rentbutter.com/apply/marblestone
contact“Phone: (312) 376-8753”
Context
7 sites in the index share the category property management, 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, 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
The RVA Group RealtyLocal Richmond property management company managing 200+ rental homes for 120+ owners sinc
property management Seth Watte PropertiesSeth Watte Properties manages residential, commercial, and Airbnb rentals in Twin Falls, I
property management Brickwood ManagementBrickwood Management provides property management, rental townhomes, and new home construc
property management MOZO Zarządzanie NajmemProperty management service for rental apartments in Gdańsk and Trójmiasto since 2012, man
property management KeasyKeasy offers modular, flat-fee property management services for Washington landlords with
property management EFROSEFROS provides cybersecurity, managed IT, 24/7 SOC, and AI governance services under one S
cybersecurity managed services provider EveryEvery offers a subscription with ideas, apps, and training from AI practitioners, plus ess
subscription newsletter Record generated from a live database query. Method: about the index.