# www.allunderplumbing.com — plumbing and HVAC — 2 of 5

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> Probe-verified (tier 2 of 3). Last checked 2026-09-28. 2 of 5 capability checks passed. 2 unknown.

- host: www.allunderplumbing.com
- url: https://www.allunderplumbing.com/
- category: plumbing and HVAC
- type: business
- locations: Staten Island
- language: en

## Probe-verified · tier 2 of 3

Probed live on 2026-09-28 against rubric v1.2. 2 of 5 checks passed. 2 unknown.

- UNKNOWN — Markdown negotiation (`Accept: text/markdown`)
- UNKNOWN — Markdown twin at a predictable URL (`/page.md`)
- PASS — llms.txt (`/llms.txt`)
- FAIL — API catalog (`RFC 9727`)
- PASS — MCP server card answers (`/.well-known/mcp/server-card.json → tools/list`)

MCP tools (from tools/list on 2026-09-28, served from www.wixapis.com): search_catalog, lookup_catalog, get_product, create_checkout, get_checkout, update_checkout, complete_checkout, cancel_checkout

## Summary

Plumbing and heating services including emergency repairs and installations for commercial, residential, and industrial clients in Staten Island and surrounding boroughs, with DOT and DOB Gas Certified, licensed, and insured professionals.

## Context

109 sites in this index share the category "plumbing and HVAC"; 35 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

How we found this site: probe discovery. This site didn't declare agent access — we found it by checking the open web. Everything above was tested the same way, against the same rubric, on the date shown. [How we choose what to check, and how to opt out](https://knowngood.sh/bot)

## Where this sits

- business: https://knowngood.sh/type/business
- plumbing and HVAC: https://knowngood.sh/category/plumbing-hvac
- wix: https://knowngood.sh/platform/wix
- Browse: https://knowngood.sh/browse
- Rubric: https://knowngood.sh/benchmark