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OwnerSpec MCP Server

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OwnerSpec MCP Server

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.

Connect

Claude Code

claude mcp add --transport http ownerspec https://ownerspec.com/mcp

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

npx @modelcontextprotocol/inspector https://ownerspec.com/mcp

Related MCP server: verification-mcp

Tools

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, verified date, FAQ and 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.

A2A agent

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.

Markdown for agents

The whole site is agent-readable, not just this server:

Transparency

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.

Self-hosting

This is a Cloudflare Pages Function (functions/mcp.js, functions/a2a.js, shared code in functions/_lib/corpus.js). To run your own instance:

  1. Deploy the functions/ directory with a Cloudflare Pages project in front of a static site.

  2. The server reads its content live from the site it fronts: a build that emits /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.

  3. Replace the calculator constants in 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.

License

MIT

This server cannot be deployed

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Maintenance

ActivityMaintained
ResponsivenessNo issues

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