# Marblestone Property Group

> Probe-verified (tier 2 of 3). Last checked 2026-08-23. 3 of 5 capability checks passed.

- host: marblestonepropertygroup.com
- url: https://marblestonepropertygroup.com/
- category: property management
- type: business
- country: US
- locations: Chicago South Side, Chicago, Illinois, United States
- language: en

## Probe-verified · tier 2 of 3

Probed live on 2026-08-23 against rubric v1. 3 of 5 checks passed.

- PASS — Markdown negotiation
- fail — Markdown twin at a predictable URL
- PASS — llms.txt
- PASS — API catalog
- fail — MCP server answers

## Unverified actions

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.

- **apply** — "Apply for a rental: https://rentbutter.com/apply/marblestone" → `https://rentbutter.com/apply/marblestone`
- **contact** — "Phone: (312) 376-8753"

## Summary

Marblestone Property Group manages and maintains rental properties on Chicago's South Side, specializing in CHA-friendly scattered-site portfolios.

## Context

7 sites in this index share the category "property management"; 6 are transactional.

## How we grade

- tier 1 — **Declared**: The site says agents are welcome in its robots.txt. A permission, not a capability.
- tier 2 — **Probe-verified** (this site): We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
- tier 3 — **Behaviourally verified**: An agent completed the action end to end — booked, bought, submitted — and it worked.

## About this record

Known-Good probes sites live and publishes what was tested and when.
Method: https://knowngood.sh/about.md · Rubric: https://knowngood.sh/benchmark