The full upstream README, mirrored here for reference. Install config, tool schemas, adoption signals, and an original overview live on the OwnerSpec listing page.
The official Model Context Protocol server for OwnerSpec.com, an independent, numbers-first reference for the equipment people own and maintain at home. First vertical: home water treatment (softeners, sediment and carbon filters, reverse osmosis, UV, iron, hardness, sulfur smell, well water testing). Every figure on the site is cited to EPA, NSF/ANSI, WQA, a state extension service or the manufacturer's own document, and every page carries the date its facts were verified.
Live endpoint: https://ownerspec.com/mcp
Stateless Streamable HTTP transport (JSON-RPC 2.0 over POST), no authentication, no sessions. Any MCP client can connect and start calling tools immediately.
Claude Code
Claude.ai / Claude Desktop: Settings, Connectors, Add custom connector,
https://ownerspec.com/mcp, no authentication.
ChatGPT: Settings, Connectors, Advanced, Developer mode, then add
https://ownerspec.com/mcp as an MCP connector (no auth).
MCP Inspector
| Tool | What it does |
|---|---|
search_pages | Full-text search over every page, filterable by layer (guides, calculators, parts, reviews) and topic |
get_page | Fetch one page as clean Markdown with canonical URL, dates and sources |
get_quick_answer | The page's cited 134 to 167 word quick answer, its fact sheet (answer, formula or compatibility basis, inputs, assumptions, method, typed primary source), verified date, FAQ and typed source list: the passage to quote |
diagnose_water_problem | Symptom or lab result in, the matching diagnosis guides and their quick answers out |
find_replacement_part | Model or part number in, the cartridges, lamps or parts that fit out, with product links |
get_product_picks | The picks from the review and parts pages that match a need, with Amazon product links |
convert_water_hardness | gpg, mg/L, dH, fH, Clark and mmol/L, with the USGS band |
size_water_softener | Grain capacity between regenerations, nearest nominal size and the salt-efficient Fleck 5600SXT row |
Every answer ends with the URL to cite and the facts-verified date. The two calculator tools use the same constants as the calculator pages on the site, and the site's build fails if either side drifts.
The server also exposes resources (llms.txt, llms-full.txt, the sitemap, the search
index, the OpenAPI description, auth.md) and one prompt, answer_from_ownerspec.
functions/a2a.js is a minimal A2A agent at
https://ownerspec.com/a2a: a question in a SendMessage (or message/send) call, a
completed task out whose artifact holds the matching pages, quick answers and URLs to cite.
Card: https://ownerspec.com/.well-known/agent-card.json.
The whole site is agent-readable, not just this server:
Accept: text/markdown, or at its URL plus
index.md./.well-known/mcp/server-card.json,
/llms.txt,
/.well-known/agent-skills/index.json,
/.well-known/api-catalog,
/.well-known/ard.json,
/openapi.json,
/auth.md.OwnerSpec is an affiliate-funded site. Product links returned by find_replacement_part and
get_product_picks are Amazon Associates links; every response that carries one ships a
disclosure field saying so, and the tool descriptions say it plainly. Editorial content is
free to read, with no paywall and no auth. The site makes no medical claims and neither do
the tools: contaminant figures are quoted as EPA, WHO or state limits.
This is a Cloudflare Pages Function (functions/mcp.js, functions/a2a.js, shared code in
functions/_lib/corpus.js). To run your own instance:
functions/ directory with a Cloudflare Pages project in front of a static site./index.json
(one record per page: title, url, layer, topic, dates, quick answer, FAQ, sources, picks,
text) and a Markdown twin at <page>/index.md. Point the SITE constant at your deployment.mcp.js with the ones printed on your own pages, or
remove those two tools.This repository mirrors the production functions. Keep them in sync with your own site config if you fork it.