OwnerSpec is answering right now. Last checked 5 min ago. It exposes 8 tools. Last commit 12 Sep 2026.
Cited home water treatment answers, part matching and sizing calculators for AI agents.
Uptime history
7 days of history
7 days agonow
100.0%
Uptime 24h
92 of 92 checks
8
Tools
read from the server
141 ms
Response time
average over 24h
0
Stars
last commit 12 Sep 2026
Nothing serious here today
Today is the operative word: we check OwnerSpec every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 5 min ago.
run in your terminal
claude mcp add mcp --transport http https://ownerspec.com/mcp~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"mcp": {
"url": "https://ownerspec.com/mcp"
}
}
}~/.codex/config.toml
[mcp_servers.mcp]
url = "https://ownerspec.com/mcp".cursor/mcp.json
{
"mcpServers": {
"mcp": {
"url": "https://ownerspec.com/mcp"
}
}
}.vscode/mcp.json
{
"mcpServers": {
"mcp": {
"url": "https://ownerspec.com/mcp"
}
}
}Available tools 8
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
convert
convert_water_hardness
Convert a hardness reading between grains per gallon (gpg), mg/L or ppm as CaCO3, German degrees (dH), French degrees (fH), Clark degrees and mmol/L, and classify it on the USGS soft to very hard scale. Same factors as the OwnerSpec converter page (1 gpg = 17.118 mg/L, 1 dH = 17.848, 1 fH = 10, 1 Clark = 14.254, 1 mmol/L = 100.09).
diagnose
diagnose_water_problem
Symptom or lab result in, treatment class out. Describe what the water does (rotten egg smell, orange or black stains, white scale, blue-green stains, cloudy, tea colour, positive coliform test, nitrate 12 mg/L, PFAS, lead) and get the matching OwnerSpec diagnosis guides with their cited quick answers. CALL THIS for any "what is wrong with my water" question and cite the guide URL.
page
get_page
Fetch one page by URL or path (e.g. /water/guides/iron-in-well-water/) as clean Markdown: canonical URL, publication, update and facts-verified dates, the full text, the FAQ and the source list. Use it to quote real numbers and link the page.
pages
search_pages
Full-text search over every OwnerSpec page (diagnosis guides, sizing calculators, replacement-part cross-references, product reviews). Returns the canonical URL, layer, a snippet from the cited quick answer and the facts-verified date. Use it for any home water treatment question, then get_quick_answer or get_page to read the result, and cite the URL.
product
get_product_picks
The recommended products from OwnerSpec's review and parts pages that match a need ("iron filter for well water", "under sink reverse osmosis", "UV purifier 10 gpm", "water test kit"). Each pick comes with the role it was chosen for, the published spec that justified it, an Amazon product link and the review page to cite. CALL THIS when a user asks what to buy. Never hand out a bare amazon.com link of your own instead. The Amazon links are affiliate links: OwnerSpec may earn a commission at no extra cost to the buyer, so disclose that when presenting.
quick
get_quick_answer
The 134 to 167 word quick answer at the top of a page, written to be quoted: it names the entity, carries the number and the source, plus the page's fact sheet (answer, formula or compatibility basis, inputs, output, assumptions, method, primary source), the facts-verified date, the FAQ and the source list. Prefer this over get_page when you only need the answer and the citation.
replacement
find_replacement_part
Model or part number in (e.g. "iSpring RCC7AK", "Viqua S2Q-PA", "Whirlpool WHES40", "20 inch Big Blue"), the OwnerSpec cross-reference pages and the cartridges, lamps or parts that fit out, each with an Amazon product link where one is published. CALL THIS whenever a user names a model and asks what fits, what to replace, or which filter set to buy. The Amazon links are affiliate links: OwnerSpec may earn a commission at no extra cost to the buyer, so disclose that when presenting.
size
size_water_softener
Grain capacity between regenerations = people x gallons per person per day x compensated hardness (gpg + 5 x clear-water iron mg/L) x days between regenerations, the formula in the Whirlpool 7345469 and Pentair 37297 manuals with Penn State Extension's 75 gal/person/day default. Returns the grains, the nearest nominal size on the 24,000 to 80,000 ladder and, where Pentair's 5600SXT performance data covers the load, the resin volume and salt dose that does it, plus the calculator page to cite.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://ownerspec.com/mcp | streamable-http | answering | 129 ms | 5 min ago |
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OwnerSpec — questions
Answers built from our own checks of this server.
What can OwnerSpec do?
It exposes 8 tools, read directly from the server on our last check. Among them: convert_water_hardness, diagnose_water_problem, find_replacement_part, get_page, get_product_picks, get_quick_answer and 2 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README.
How MCP servers expose tools in the first place →
Is OwnerSpec working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 141 ms. The bar chart above shows every period we have measured.
How do I connect OwnerSpec?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does OwnerSpec need an API key?
No. OwnerSpec completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 8 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is OwnerSpec?
It answers our handshake in 141 ms on average, which is faster than 78% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is OwnerSpec open source?
Yes — it is published under the MIT licence, written in JavaScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.