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Which MCP servers are PartAnswers's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-29

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Whose server it is
  • Registry namecom.partanswers/filter-lookupverified in the MCP registry

The registry name sits under partanswers.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-29
  • Stateanswerschecked 2026-10-29
  • Tools3
  • Server calls itselfpartanswers-filter-lookup
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-29 the server answered initialize and tools/list without a sign-in. First answer in 342 ms.

Should an agent connect itConnect it
  • Its tools do every use case we checked: look up the filter a fridge model number takes; compare certification tiers before buying a replacement filter.

Once connected

  • For "look up the filter a fridge model number takes", the likely first call is find_filter_for_model.
  • Parameters are untyped or undescribed in 1 of 4 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 7, the first on 2026-10-29
  • INITE MCP score99 of 100answers 100 · does the job 100 · definitions 96 · context 100 · connects 100
  • What an agent can do with it2 of 2 use cases
  • Answered100% of days7 of 7 daily checks
  • Median first answer288 ms
  • Space in an agent's context≈ 599 tokensthe definitions of all its tools (4), which an agent carries on every turn
  • Tool definitionsA · 96 of 100
  • Typed results0 of 4 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 1 of 4

What an agent can do with it

  • can do · look up the filter a fridge model number takes
  • not sure · check whether a cheaper replacement filter is listed
  • can do · compare certification tiers before buying a replacement filter

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers3 tools · read 2026-10-29
  • find_filter_for_model

    Given a refrigerator model number (for example RF28R7351SR or WRS325SDHZ00), return the genuine water filter it takes (fit from the appliance maker page, with source URL and read date) and how replacement filters compare on public NSF…

  • compare_filter_options

    Given a genuine refrigerator filter part number (HAF-QIN, DA29-00020B, EDR1RXD1, LT1000P, LT700P, EPTWFU01, XWFE, EDR4RXD1 where published), list the genuine filter and every replacement sold under its number with the certification…

  • get_part_details

    Full record for one genuine refrigerator filter: maker specs (rated gallons, change interval), every certification listing with URL and read date, and the refrigerator models the maker lists for it.

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "filter-lookup": {
      "type": "http",
      "url": "https://partanswers.com/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

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

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://partanswers.com/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.